Home / A2 Socket Countersunk Screws

Payments secured by PaymentSense Merchant Services

Free Delivery

	on UK orders of over £40 nett.
	on EU orders of over £60 nett.

Socket Countersunk Screws

Socket Countersunk Screws often know as Flat Head Screws have a contersunk head that when fitted sit flush within the receiving surface. Fastened into place using a Hex, Allen or Torx Key with the newer Torx drive giving a much more engaged drive where more torque can be applied. Available in metric and imperial sizes. Socket Countersunk Screws are a very popular fastener, but care must be taken when purchasing as they do not automatically come fully threaded above certain lengths.

Material Key
A2	A2 Stainless Steel - also known as grade 304 or 18/8. A general purpose grade of stainless steel.
A4	A4 Stainless Steel - also known as grade 316 or 18/8/3. A higher corrosion resistant, marine grade of stainless steel.
BO	Black oxide high tensile steel class 12+ - a high tensile non-stainless grade with a black oxide finish offering limited corrosion resistance
BZP	Bright Zinc Plated (BZP) Steel - non-stainless standard steel grade offering a basic level of corrosion resistance.
BZP-10.9	Bright Zinc Plated (BZP) Class 10 high tensile steel - a high strength non-stainless grade for screws and bolts, with a basic level of corrosion resistance.

less...

more...

Socket Head Countersunk Screws ISO 10642 (DIN 7991)

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.

BZP-10.9

M2.5

UNC Socket Head Countersunk Screws ASME B18. 3-2003

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.

BZP

2-56

4-40

6-32

8-32

10-24

5/16

UNF Socket Head Countersunk Screws ASME B18. 3-2003

BZP

10-32

5/16