Stainless Nuts & Bolts

Philips Truss Head Machine Screws (UNC) has a wide and shallow domed shape, which can negate the use of a washer. The head shape also gives a larger contact area with the surface, which means a snag free fitment and helps guard against tampering. For use either in a pre-tapped hole or nut assembly. Ideal for sheet metal projects and applications where there is minimal clearance, such as sliding supports in draws and cabinets. Imperial Unified Coarse thread version. Phillips drive is x-shaped for installation with a Phillips screw driver.

UNF Phillips Fillister machine screws have a large cylindrical head, with a slightly convex top surface. Fillister head screws are the preferred head type for counterbored holes and can also be used for protecting a surface by raising the level which the screw diver is used to tighten the fixing. They are similar to a Pan head machine screw, but with greater side height. Height to diameter ratio is larger than a cheese head. Imperial Unified Fine thread version.

A metric fine thread version of the common DIN 933 / ISO 4017 hexagon head set screw. Fine pitch variant screws have some distinct advantages over their coarse pitch counterparts. Size for size they are stronger than the coarse thread versions "in tension" as there is a larger stress (contact) area. They also have a larger minor diameter meaning shear is less likely. Fine Pitch set screws have less tendancy to loosen as they have a much smaller thread incline. Fine pitch bolts should be preferred if being used to adjust settings, as they give closer, more precise control. Some downsides of using Fine pitch bolts or screws are they are slower to install, so not ideal where quick fitment and removal are required and they are also more likely to suffer from thread galling (see our reference section).

The DIN 6921 or EN 1665 flange bolt is a hexagon headed bolt or screw incorporating a flange, negating the need for a washer. Flange bolts are a more attractive alternative to their DIN 931 and DIN 933 hex driven counterparts. Typically used where The flange offers protection for the bolted component where the driving tool may otherwise scratch its surface. Generally manufactured with a full thread, though occasionally some stock may include a partially threaded shank. This variant is plain, unserrated under the head.

A 6 lobe or torx driven variant of the popular flanged socket button screw. Again, torx button flange screws can be employed where aesthetics are important, or where space is limited.

Socket shoulder screw with a UNC imperial coarse thread. They are also known as shoulder bolts, precision shoulder screw and in the US, stripper bolts. The main dimensions are for the diameter and total length required under the head. Shoulder screws have an undercut portion between the thread and shoulder, allowing a close fit. They are used in a wide range of punch and die operations and as shafts, pivots, guides, pins, linkages and trunion mountings. Please note that the nominal diameter here refers to the shoulder diameter, except where shown otherwise.

These fine pitch metric nyloc nuts are manufactured to DIN 985 and are the low Type T. Nylocs are also known as prevailing torque or locking nuts. As they are tightened onto a bolt, the bolt will cut a thread into the nylon part, making it less likely to loosen. The fine pitch means that there are more threads per centimetre, giving more engagement and adjustability to the fixing. They need to be used in conjunction with the same pitch bolt. Typically fitted with a spanner or ratchet with socket. We recommend that anti-galling measures are taken on installation of stainless steel variants of these items.

UNC Phillips Fillister machine screws have a large cylindrical head, with a slightly convex top surface. Fillister head screws are the preferred head type for counterbored holes and can also be used for protecting a surface by raising the level which the screw diver is used to tighten the fixing. They are similar to a Pan head machine screw, but with greater side height. Height to diameter ratio is larger than a cheese head. Imperial Unified Coarse thread version.

Fine pitch screws are used in conjunction with a fine pitch threaded hole, or with fine pitch nuts which are also available on this website. The extra thread engagement gained from the finer pitch gives a more secure and stronger fitment. Used where high levels of strength are required - a fine pitch bolt has a larger stress area creating better tension than its coarse pitch counterpart, also they are less inclined to loosening through vibration due to the thread incline being smaller.

Nut conforming to DIN 439 but with Fine Thread Pitch. Also known as a half nut, thin nut, or jam/lock nut. Typically fitted with a spanner or ratchet with socket, often used in pairs in a nut locking arrangement. A popular nut type, with a more unusual Fine Thread Pitch for when more thread engagement is required. Must be used in conjunction with the appropriate Fine Thread Pitch bolts or screws.

Philips Truss Head Machine Screws (UNF) has a wide and shallow domed shape, which can negate the use of a washer. The head shape also gives a larger contact area with the surface, which means a snag free fitment and helps guard against tampering. For use either in a pre-tapped hole or nut assembly. Ideal for sheet metal projects and applications where there is minimal clearance, such as sliding supports in draws and cabinets. Imperial Unified Fine thread version. Phillips drive is x-shaped for installation with a Phillips screw driver.

The DIN 6921 or EN 1665 flange bolt is a hexagon headed bolt or screw incorporating a flange, negating the need for a washer. Flange bolts are a more attractive alternative to their DIN 931 and DIN 933 hex driven counterparts. Typically used where The flange offers protection for the bolted component where the driving tool may otherwise scratch its surface. Generally manufactured with a full thread, though occasionally some stock may include a partially threaded shank. This variant includes serrations under the head.

Prevailing Torque Nuts are a type of all metal locking nut. Designed to lock and resist vibration or shock. Part of the top threads on the nut deform to create a locking action by increased friction, meaning they will not spin freely and torque via a spanner would be needed to fit and remove - hence the name Prevailing Torque. Ideal for applications that require protection against vibratory and other equally dynamic forces. Being All Metal, they do not suffer adversely from high temperatures or chemical contact like other materials such as plastic (used in Nyloc Nuts). Used frequently in Farming Machinery, Automotive and Production Processes.

DIN 444 eye bolts / swing bolts in A4 stainless steel, with threaded shaft. Ideal for anchoring hooks, attaching rope wire and cables to solid surfaces, such as wood, metal, concrete, etc. The A4 stainless steel, grade 316-NM give it corrosion resistance and durability, making it perfect for marine, food, medical and pharmaceutical industrial enviroments.

Fine Pitch Threaded hexagon full nut to DIN standard 934. Typically fitted with a spanner or ratchet with socket. The significantly more unusual Fine Pitch variant of the standard Coarse Pitch hex nut for use where more thread engagement is desired. Only for use in conjunction with a matching Fine Thread Pitch bolts or screws.

Commonly referred to as a setscrew or simply as a bolt. The fully threaded DIN 933 or ISO 4017 should not be confused with its DIN 931 equivalent. A standard spanner or ratchet is typically used to fit this product. Used for decades on all types of assembly throughout the world. As with the DIN 931 hex bolt, the hex drive allows a higher torque to be applied. All parts are to DIN 933 except where shown otherwise. The alternative standard ISO 4017 specifies differences in head dimensions for M10, M12 and M14 thread diameters from DIN 933. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

The most common type of fastener, a hex head bolt is designed to be tightened with a standard spanner or ratchet and socket. Popularly used in all assemblies, a standard hex bolt is a staple across the world. Manufactured to ISO 4014 or DIN 931, and therefore includes an unthreaded section of the shaft. A hex drive permits a greater torque load to be applied to the joint over most other drive types. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

Hexagon full nut to DIN standard 934 with standard metric coarse pitch. Typically fitted with a spanner or ratchet with socket. The most popular nut type, and used for decades on all types of assemblies throughout the world. Can be used in conjunction with Hexagon Thin nuts in a "locking" formation for a more secure fitment. Fine pitch and left hand thread variants are also available immediately below this item. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

Prevailing torque type nut manufactured to DIN 985. Popularly employed Hexagon nut incorporating a nylon insert to help prevent loosening when fitted. This is the standard profile variant (Type T), a higher profile option is available under DIN 982 (Type P). Typically fitted with a spanner or ratchet with socket.

Also known as an Allen screw or Allen bolt, or simply a cap screw. Socket Head Cap screws are a more modern alternative standard machine fastener to the standard hexagon headed bolt or setscrew, as found on much modern machinery. A hex key (otherwise known as an Allen key) is required to fit these fasteners. Conforming to DIN 912 or ISO 4762. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

Also known as an Allen screw or Allen bolt, or simply a cap screw. Socket Head Cap screws are a more modern alternative standard machine fastener to the standard hexagon headed bolt or setscrew, as found on much modern machinery. A hex key (otherwise known as an Allen key) is required to fit these fasteners. Conforming to ISO 4762 or DIN 912, the contact surfaces of this screw or bolt are protected from external damage. This variant is supplied fully threaded regardless of length of screw.

A popular and attractive socket head screw, typically used where aesthetics are important, or where a lower profile domed finish is required. The hex drive is generally smaller than other hex driven ranges and thus the ultimate tightening torque is reduced. Manufactured to ISO 7380, and almost always fully threaded.

A Machine screw with a phillips drive, designed to be tightened with a screwdriver. Typically found on consumer electronics and other small machinery where high torque fasteners are not necessary. Conforms with DIN 7985. Sometimes considered more attractive than a pozidriv equivalent.

A prevailing torque type hexagon nut incorporating a flange and nylon insert to help prevent loosening when fitted. This particular version has serrations on the base of the flange. A non-serrated version is also available. Manufactured to DIN 6926.

A Machine screw with a pozi drive, designed to be tightened with a screwdriver. Typically found on consumer electronics and other small machinery where high torque fasteners are not necessary. Conforms with DIN 7985.

A Torx Key (6 Lobe) driven example of the more familiar Socket Head Cap Screw, these are a more modern alternative standard machine fastener to the standard hexagon headed bolt or setscrew, as found on much modern machinery. A Torx key (6 lobe) is required to fit these fasteners and gives a much more secure drive allowing for more torque and a surer tightening feel. Conforming to ISO 4762 or DIN 912, the contact surfaces of this screw or bolt are protected from external damage. Generally manufactured with a partial thread beyond a certain length and nominal diameter combination, but occasionally some stock may include a fully threaded shank at the same combination. Ideal for uses where there is little room or clearance for securing.

A popular and attractive socket head screw with an integrated flange offering a wider head for bolting softer materials. Typically used where aesthetics are important, or where a lower profile domed finish is required. The hex drive is generally smaller than other hex driven ranges and thus the ultimate tightening torque is reduced. Manufactured to ISO 7380, the same standard as the non flanged variant, and always fully threaded.

Nut conforming to DIN 439. Also known as a half nut, thin nut, or jam/lock nut. Typically fitted with a spanner or ratchet with socket, often used in pairs or in conjunction with a hexagon full nut in a locking arrangement. A popular nut type, and used for decades on all types of assembly throughout the world. Fine Pitch and Left Hand Thread variants are also available immediately below this item.

A hexagon nut designed for welding to a part to form a threaded insert. The design incorporates a locating boss and welding projections. Conforms to DIN929.

A machine screw with a traditional slot drive and a flat topped near cylindrical shaped head. Manufactured to ISO 1207 or DIN 84. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

A wide headed, lower profile screw with a traditional slot drive. Used for bolting softer materials. This unusual fastener is always manufactured with a full thread.

Slotted or split beam type hexagon all metal locking nut . Manufactured in the UK with the Aerotight trademark. Undersize threaded sections on top portion of nut mean that when tightened into position the undersize section is forced outward creating high friction and a more secure 'locked' fitment. A locking nut for use in higher temperatures where a locking nylon ring nut would be unsuitable.

A prevailing torque type hexagon nut incorporating a flange and nylon insert to help prevent loosening when fitted. This particular version is non-serrated on the base of the flange. A serrated version is also available. Manufactured to DIN 6926.

Flexible usage threaded bar or threaded rod, also known as Studding. Manufactured to DIN 975. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

One Way Security Screws also known as Clutch Head Security Screws. These screws are designed to only be turned in a clockwise direction so once tightened into position they are difficult to remove (unless you have a specialist removal tool). Can be fitted using a standard slotted screwdriver and ideal for use in applications such as access panels, number plates and many anti-vandalism securing solutions.

A prevailing torque type locking version sharing the characteristics of the DIN 1587 dome nut. Incorporating a nylon insert to help prevent loosening when fitted. Conforms to DIN 986.

Similar to the DIN 912 socket cap screw but with a lower head height and smaller hex drive, the DIN 7984 is used where space is limited. This range is generally manufactured with a partial thread beyond a certain length and nominal diameter combination, but occasionally some stock may include a fully threaded shank at the same combination.

Capstan Screws are designed to be tightened or loosened from the side rather than the top. By inserting a small bar into one of the side radial holes in the head. Manufactured to DIN 404 and with a slotted head. Great for use where there is restricted access to the top of the screw.

Compared to standard hex nuts, square nuts have a greater surface contact with the part being fastened, and therefore provide greater resistance to loosening. They are also much less likely to become rounded-off after repeated loosening/tightening cycles. Manufactured to DIN 557.

Similar to the DIN 912 torx cap screw but with a lower head height and smaller Torx Key (6 lobe drive), the ISO 14580 (DIN 7984) is used where space is limited. This range is generally manufactured with a partial thread beyond a certain length and nominal diameter combination, but occasionally some stock may include a fully threaded shank at the same combination.

Also known as star, 6 lobe, and hexalobular internal. Torx screws are commonly found on cars, motorcycles, bicycle brake systems, hard disk drives, computer systems and consumer electronics and are becoming increasingly popular. Once, they were typically used in applications requiring tamper resistance; as drivers became more common, specific tamper-resistant variants were developed. The Torx design allows for a higher torque to be exerted than a similarly sized conventional hex socket head. Conforms with DIN 7985.

Prevailing torque type nut manufactured to DIN 982. Hexagon nut incorporating a nylon insert to help prevent loosening when fitted. This is the higher profile (Type P) variant with more available thread engagement and is typically fitted with a spanner or ratchet with socket. A lower profile, where perhaps space is at a premium is also available under DIN 985 (Type T).

A popular nut used in applications where aesthetics are important, giving an attractive look. Domed end also ensures a smooth snag-free finish protecting both the fixing and any foreign body that may come into contact . Also known as an Acorn Nut, these nuts are manufactured to DIN 1587. Also available with a Nyloc insert to DIN 986. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

A popular machine screw with a pozi drive. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. These items are always fully threaded. Conforms to DIN 965. Typically found on consumer electronics and other small machinery where high torque fasteners are not necessary.

A raised countersunk headed screw offering an attractive finish. Always fully threaded, and includes an old style slot drive for fitting.

A square profile nut designed for welding to a part to form a threaded insert. The design incorporates a locating boss and welding projections. Conforms to DIN928.

A popular machine screw with a phillips drive. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. These items are always fully threaded. Conforms to DIN 965. Typically found on consumer electronics and other small machinery where high torque fasteners are not necessary.

Slotted Sleeve Nuts also known as Slotted Barrel or Case nuts. These examples have a slotted raised/oval countersunk head. Internally threaded and giving a smooth flush attractive finish they require a standard flat head screwdriver for fitting. Available in A2 stainless steel, giving great corrosion resistance.

A closed end nut often used when a professional attractive finish is called for. Also the cap helps protect the fixture from foreign object ingress/damage and gives a nice smooth snag-free surface. Conforms to DIN 917.

A slotted, castellated or castle nut gets its name from the slot's resemblance to the crenellations of a typical castle. These nuts are usually paired with a split pin or R-clip to form a positive locking device.

Thumb Screws or Knurled Knob Screws are designed to be tightened and loosened by hand, without the need for a screwdriver or ratchet. The 'knurled' feature of the head makes this type of screw ideal for use where conditions can be challenging such as food preparation or clean room operations. Manufactured to DIN 464.

Also known as star, 6 lobe, and hexalobular internal. Torx screws are commonly found on cars, motorcycles, bicycle brake systems, hard disk drives, computer systems and consumer electronics and are becoming increasingly popular. Once, they were typically used in applications requiring tamper resistance; as drivers became more common, tamper-resistant variants were developed. The Torx design allows for a higher torque to be exerted than a similarly sized conventional hex socket head. This button head variant is an attractive screw, typically used where aesthetics are important, or where a lower profile domed finish is required.

A tamper resistant screw requiring specialist Torx drive tooling to fit. This button head variant is an attractive screw, typically used where aesthetics are important, or where a lower profile domed finish is required. Uses include street furniture and garden equipment. Also known as a Star or 6 Lobe Drive. Please call us if the multi-tool security drive bits are required.

A slot drive, countersunk headed screw, typically used in conjunction with a countersunk hole which provides a flush, snag free fit.

Similar to DIN 84, but with a larger head diameter and a slightly different head profile. Manufactured to ISO 1580 or DIN 85. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

A hexagon nut 1.5 x its nominal diameter in height. Used in clamping applications that require frequent removal and re-fitting. Flat at one end and spherical at the other, so can be used in conjunction with conical seat washers. Manufactured to DIN 6330

An hexagon nut with incorporated flange, to DIN 6923. The flange offers protection for the bolted component where the driving tool may otherwise scratch it's surface. The flange also lessens the need to use a washer. This particular version has serrations on the base. A non-serrated variant is also available.

Also known as star, 6 lobe, and hexalobular internal. Torx screws are commonly found on cars, motorcycles, bicycle brake systems, hard disk drives, computer systems and consumer electronics and are becoming increasingly popular. Once, they were typically used in applications requiring tamper resistance; as drivers became more common, specific tamper-resistant variants were developed. The Torx design allows for a higher torque to be exerted than a similarly sized conventional hex socket head.

Generally used in timber to timber and timber to metal construction, these bolts incorporate a square neck to grip the hole in the timber when fitting, and therefore negates the need for any drive recess to be included on top of the head. Supplied to DIN 603. Manufactured with a partially threaded shank. Nuts are supplied seperately, unlike the mild steel versions available elsewhere on the site.

Generally used in timber to timber and timber to metal construction, these bolts incorporate a square neck to grip the hole in the timber when fitting, and therefore negates the need for any drive recess to be included on top of the head. Supplied to DIN 603. Manufactured with a fully threaded shank. Nuts are supplied seperately, unlike the mild steel versions available elsewhere on the site.

Knurled Thumb Nuts manufactured to DIN 466. These examples are the high profile thumb nuts and feature knurling for a more assured grip. Made from machineable A1 grade stainless steel, so benefitting from good anti-corrosion properties. Designed to be located and fitted by hand, even in more challenging applications and giving an attractive finish when used.

Wing Screws (American Form) DIN 316 AF. These are designed to be used by hand and can give the user a more accurate adjustment. Employed in applications where the bolts need to be frequently tightened and loosened, negating the need for tooling. With large wings they are comfortable for continuous handling.

A countersunk headed screw conforming with ISO 10642 or DIN 7991, requiring a hex key (otherwise known as an Allen key) to fit. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. Generally manufactured with a full thread, though occasionally some stock may include a partially threaded shank. The head diameter is slightly larger than that of the equivalent DIN 965 Phillips or Pozi driven screw.

Slotted Round Nuts manufactured to DIN 1804. A nut requiring the use of a C Spanner (DIN 1810) or Hook Spanner. One surface of the nut protrudes and should be used as a mating surface.

Metric Cage Nuts, also known as Captive Nuts or Clip Nuts. The captive nut (usually square in shape), is enclosed in a surrounding cage ready for engaging with a screw later in the assembly process. Due to the 'floating' nature of the nut in the cage, they can be used for slightly adjusting any alignment issues during assembly Perfect for use in the mounting rails of equipment racks such as Data Cabinets.

Slotted Thumb Screws or Slotted Knurled Knob Screws are designed primarily to be tightened and loosened by hand, without the need for a screwdriver or ratchet, but this version comes with a slot in the head for a standard slotted screwdriver. The 'knurled' feature of the head makes this type of screw ideal for use where conditions can be challenging such as food preparation or clean room operations. Manufactured to DIN 465.

Popularly employed where frequent hand tightening and untightening of joints is required. To the American form, with less rounded, squared off wings. Similar to DIN 314/315. Please note that the wing span may vary between batches.

A hexagon nut 1.5 x its nominal diameter in height with a collar, therefore negating the need for a washer. Used in clamping applications that require frequent removal and re-fitting. Manufactured to DIN 6331

Hexagon Coupling Nuts also known as a long nut, these DIN 6334 connector nuts are typically employed in joining sections of threaded bar/studding together where required.

A tamper resistant torx driven screw requiring specialist drive tooling to fit and remove. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. Great for anti-vandalism solutions or where a degree of security is required. Also known as Star Drive or Six Lobe Drive. Please call us if the multi-tool security drive bits are required.

Hexagon Coupling Nut also known as an Extension Nut, used for joining two male threads, usually threaded bar/studding but also used on piping. The hexagon shape to the outer of the nut allows for tightening with a spanner /wrench. Sold in various lengths dependent on the application requirements.

Hexagon Head Set Screw with Slot. Manufactured similar to ISO 4017 (DIN 933) and always fully threaded. Perfect for use where a spanner or socket are unable to be utilised.

Round Coupling Nuts similar to DIN 6334 but with a smooth rounded finish as opposed to hexagonal. Used when connecting two pieces of threaded bar/studding. Please note that these items are not produced to a recognised standard and therefore some dimensions may vary.

A thin or half nut variation of the standard DIN 557 square nut. To DIN 562.

Popularly employed where frequent hand tightening and untightening of joints is required. To the German Form with slightly larger, rounded wings. To DIN 315. Please note that due to manufacturing limitations, all nylon variants of these items are only "similar to" and not "in absolute accordance with" the standard specified.

To DIN 966. A countersunk headed screw incorporating a slightly raised head which gives it an attractive finish when fitted. Phillips driven and a very popular fixing.

Also known as a set screw, these headless types of screws have many uses. This particular type has a hex socket drive, and a depression called a 'cup' on the opposite end, as to ISO 4029 or DIN 916.

Designed for use when woodworking, providing a threaded insert once fitted. For use on both soft and hard woods, simply drill out a pilot hole of the correct size, hammer into place to give a receiving threaded insert wherever needed. The design incorporates four teeth or prongs for biting into the workpiece. A2 Stainless Steel is suitable for outdoor use with such items as garden furnishings or childrens play equipment. Bright Zinc Plated (BZP) are generally for indoor use or where corrosion is not a concern. Please note that these items are not defined by a standard, and so design features and dimensions can vary between batches.

To DIN 966. A countersunk headed screw incorporating a slightly raised head which gives it an attractive finish when fitted. This variant is Pozi driven and a very popular fixing.

Counter Nut also known as a Pal Nut, are a stamped nuts made from sheet metal. They are designed to fit over a normal nut and lock it into place by using a series of protruding flanges that grip the host nut securely. Mainly used in conjunction with a standard hexagon nut. Manufactured to DIN 7967.

Also known as a set screw, these headless types of screws have many uses. This particular type has a hex socket drive, and a flat on the opposite end, as to ISO 4026 or DIN 913.

Also known as a set screw, these headless types of screws have many uses. This particular type has a hex socket drive, and a cone point on the opposite end, as to ISO 4027 or DIN 914.

Also known as a set screw, these headless types of screws have many uses. This particular type has a hex socket drive, and a square profiled end called a dog point on the opposite end, as to ISO 4028 or DIN 915.

Hexagon thin, jam, locking or half nut with standard metric coarse pitch, but with a Left Handed Thread. To DIN 439. Only for use in conjunction with Left Handed Thread bolts or screws.

Hexagon Machine Screw Nuts (UNC - Unified Coarse Pitch) imported from the USA. These nuts generally have smaller internal diameters than the range available in standard hexagon nuts, so fit the smaller gauge sizes for Imperial screws. They also tend to be thinner or lower in height but have a larger outer diameter. These are specifically designed to be used in conjunction with other UNC screws or bolts. Often used in small electrical goods manufacturing, such as computers and hifi systems.

Hexagon Machine Screw Nuts (UNF - Unified Fine Pitch) imported from the USA. These nuts generally have smaller internal diameters than the range available in standard hexagon nuts, so fit the smaller gauge sizes for Imperial screws. They also tend to be thinner or lower in height but have a larger outer diameter. These are specifically designed to be used in conjunction with other UNF screws or bolts. Often used in small electrical goods manufacturing, such as computers and hifi systems.

Hexagon full nut with standard metric coarse pitch, but with a Left Handed Thread. To DIN 934. Can only be used in conjunction with Left Hand Thread screws and bolts.

Commonly referred to as a setscrew and longer versions are referred to in the United States as a tap bolt. A standard spanner or ratchet is typically used to fit this product. Used for decades on all types of assembly throughout the world. The hex drive allows a higher torque to be applied. Produced to ASME B18.2.1.

The most common type of fastener, a hex head bolt is designed to be tightened with a standard spanner or ratchet and socket. Popularly used in all assemblies, a standard hex bolt is a staple across the world. Manufactured to ASME B18. 2.1, and includes an unthreaded section of the shaft. A hex drive permits a greater torque load to be applied to the joint over most other drive types.

Commonly referred to as a setscrew and longer versions are referred to in the United States as a tap bolt. A standard spanner or ratchet is typically used to fit this product. Used for decades on all types of assembly throughout the world. The hex drive allows a higher torque to be applied. Produced to ASME B18.2.1.

The most common type of fastener, a hex head bolt is designed to be tightened with a standard spanner or ratchet and socket. Popularly used in all assemblies, a standard hex bolt is a staple across the world. Manufactured to ASME B18. 2.1, and includes an unthreaded 'shoulder' or portion of the shank. A hex drive permits a greater torque load to be applied to the joint over most other drive types.

A popular machine screw with a phillips drive. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. These items are always fully threaded. Conforms to ASME B18. 6.3. Typically found on consumer electronics and other small machinery where high torque fasteners are not necessary.

A countersunk headed screw conforming with ASME/ANSI B18.3, requiring a hex key (otherwise known as an Allen key) to fit. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. Generally manufactured with a full thread, though occasionally some stock may include a partially threaded shank.

Also known as an Allen screw or Allen bolt, or simply a cap screw, socket head cap screws are a more modern alternative standard machine fastener to the standard hexagon headed bolt or setscrew, as found on much modern machinery. A hex key (otherwise known as an Allen key) is required to fit these fasteners. Conforming to ASME/ANSI B18. 3, the contact surfaces of this screw or bolt are protected from external damage. Generally manufactured with a partial thread beyond a certain length and nominal diameter combination, but occasionally some stock may include a fully threaded shank at the same combination.

Also known as an Allen screw or Allen bolt, or simply a cap screw, socket head cap screws are a more modern alternative standard machine fastener to the standard hexagon headed bolt or setscrew, as found on much modern machinery. A hex key (otherwise known as an Allen key) is required to fit these fasteners. Conforming to ASME/ANSI B18.3, the contact surfaces of this screw or bolt are protected from external damage. Generally manufactured with a partial thread beyond a certain length and nominal diameter combination, but occasionally some stock may include a fully threaded shank at the same combination.

A popular and attractive socket head screw, typically used where aesthetics are important, or where a lower profile domed finish is required. The hex drive is generally smaller than other hex driven ranges and thus the ultimate tightening torque is reduced. Manufactured to ASME/ANSI B18.3, and always fully threaded.

A Machine screw with a phillips drive, designed to be tightened with a screwdriver. Typically found on consumer electronics and other small machinery where high torque fasteners are not necessary. Conforms with ASME B18. 6.3.

Hexagon full nut to ASME B18.6.3. Typically fitted with a spanner or ratchet with socket. The most popular nut type, and used for decades on all types of assembly throughout the world.

Popularly employed where frequent hand tightening and untightening of joints is required. To ASME B18.6.9.

Prevailing torque type nut manufactured to IFI-100/107. Popularly employed Hexagon nut incorporating a nylon insert to help prevent loosening when fitted. Typically fitted with a spanner or ratchet with socket.

Hexagon full nut to ASME B18.6.3. Typically fitted with a spanner or ratchet with socket. The most popular nut type, and used for decades on all types of assembly throughout the world.

Prevailing torque type nut manufactured to IFI-100/107. Popularly employed Hexagon nut incorporating a nylon insert to help prevent loosening when fitted. Typically fitted with a spanner or ratchet with socket.

A popular nut used in applications where aesthetics are important. Also known as an Acorn nut, these nuts are manufactured to ASME B18.2.2. These have a standard Unified Fine Thread Pitch (UNF). To be used in conjunction with same sized UNF screws and bolts.

Also known as a set screw, these headless types of screws have many uses. This particular type has a hex socket drive, and a depression called a 'cup' on the opposite end, and conforms to ASME/ANSI B18.3.

Flexible usage threaded bar or threaded rod to ASME B18.31.3.

Nut conforming to ASME B18.2.2. Also known as a half nut, thin nut, or jam nut. Typically fitted with a spanner or ratchet with socket, often used in pairs in a nut locking arrangement. A popular nut type, and used for decades on all types of assembly throughout the world.

Slotted or split beam type hexagon locking nut, of all metal construction with UNF thread form. Manufactured in the UK with the Aerotight trademark. Undersize threaded sections on top portion of nut mean that when tightened into position the undersize section is forced outward creating high friction and a more secure 'locked' fitment.

A popular nut used in applications where aesthetics are important. Also known as an Acorn nut, these nuts are manufactured to ASME B18.2.2, in this instance they have a standard Unified Coarse Thread Pitch (UNC). To be used in conjunction with same sized UNC screws and bolts.

A popular machine screw with a phillips drive. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. These items are always fully threaded. Conforms to ASME B18. 6.3. Typically found on consumer electronics and other small machinery where high torque fasteners are not necessary.

Nut conforming to ASME B18.2.2. Also known as a half nut, thin nut, or jam nut. Typically fitted with a spanner or ratchet with socket, often used in pairs in a nut locking arrangement. A popular nut type, and used for decades on all types of assembly throughout the world.

A popular and attractive socket head screw, typically used where aesthetics are important, or where a lower profile domed finish is required. The hex drive is generally smaller than other hex driven ranges and thus the ultimate tightening torque is reduced. Manufactured to ASME/ANSI B18.3, and always fully threaded.

Popularly employed where frequent hand tightening and untightening of joints is required. To ASME B18.6.9.

Prevailing torque nut, thin type. Popularly employed Hexagon nut incorporating a nylon insert to help prevent loosening when fitted. Typically fitted with a spanner or ratchet with socket.

Prevailing torque nut, thin type. Popularly employed Hexagon nut incorporating a nylon insert to help prevent loosening when fitted. Typically fitted with a spanner or ratchet with socket.

Also known as an Allen set screw, these headless types of screws have many uses. This particular type has a hex socket drive, and a depression called a cup on the opposite end, and conforms to ASME/ANSI B18.3.

Also known as a long nut, these coupling or connector nuts are typically employed in joining sections of threaded bar/studding together where required.

An hexagon nut with incorporated flange. The flange offers protection for the bolted component where the driving tool may otherwise scratch it's surface. The flange also lessens the need to use a washer. This particular version has serrations on the base.

A countersunk headed screw incorporating a slightly raised head which gives it an attractive finish when fitted. Includes a phillips cross recess for driving in. Manufactured to ANSI/ASME B18. 6.3.

Slotted or split beam type hexagon all metal locking nut with UNC Thread form . Manufactured in the UK with the Aerotight trademark. Undersize threaded sections on top portion of nut mean that when tightened into position the undersize section is forced outward creating high friction and a more secure 'locked' fitment. A locking nut for use in higher temperatures where a locking nylon ring nut would be unsuitable.

A Machine screw with a phillips drive, designed to be tightened with a screwdriver. Typically found on consumer electronics and other small machinery where high torque fasteners are not necessary. Conforms with ASME B18. 6.3.

A countersunk headed screw conforming with ASME/ANSI B18.3, requiring a hex key (otherwise known as an Allen key) to fit. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. Generally manufactured with a full thread, though occasionally some stock may include a partially threaded shank.

Shear nuts are a permanent high security fastener that do not require specialist tooling to fit. They consist of a threaded cone section with a hexagonal head at the top. The hexagonal unthreaded part of the nut is designed to shear off as it is tightened at a pre-determined torque setting. This leaves behind the tamper proof cone which is very difficult to remove as there is no drive or grip. Great for uses where a permanent anti-vandal fixing is needed and used in schools and hospitals as well as the fencing industry and car industry.

These attractive 5-Lobe Pin security machine screws offer an improved tamper resistance compared to the more commonly available 6-Lobe Pin drive. The tooling is therefore more specialised and harder for members of the public to get hold of. Also known as torx plus or pentalobe screws, this variant has a button head. Torx and other lobed drive designs allows for a higher torque to be exerted than a similarly sized conventional hex socket head.

These attractive 5-Lobe Pin security machine screws offer an improved tamper resistance compared to the more commonly available 6-Lobe Pin drive. The tooling is therefore more specialised and harder for members of the public to get hold of. Also known as torx plus or pentalobe screws, this variant has a countersunk head. Torx and other lobed designs allows for a higher torque to be exerted than a similarly sized conventional hex socket head.