Westfield Fasteners Ltd Logo
Westfield Fasteners Ltd Telephone: 01844201133, Email: enquiries@westfieldfasteners.co.uk
Home   /   UNF Bolts, Nuts and Washers   /   5/16 inch UNF Socket Head Cap Screws ASME B18. 3-2003 in Bright Zinc Plated (BZP) Steel

5/16 inch UNF Socket Head Cap Screws ASME B18. 3-2003 in Bright Zinc Plated (BZP) Steel

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.
Image of UNF Socket Head Cap Screws ASME B18. 3-2003 in BZP image
technical drawing of UNF Socket Head Cap Screws ASME B18. 3-2003
Technical Summary
d nominal diameter 5/16
tpi threads per inch 24
b minimum thread length 1.12
dk head diameter 0.469
k max. maximum head height 0.312
t min. minimum recess depth 0.151
s drive size 1/4
Standard ASME B18.8
all dimensions in inches
Datasheet
< View All Sizes
Description Sale Qtys Qty Price Breakdown Despatch Estimate
Socket Head Cap (Allen) Screw UNF 5/16 x 1/2 inch in Zinc Plated Steel
WF29004 - 51 in stock
single screw for £2.44
or box of 15 for £9.50
or bulk of 75 for £41.15
£0.00  
Socket Head Cap (Allen) Screw UNF 5/16 x 5/8 inch in Zinc Plated Steel
WF29005 - 661 in stock
single screw for £2.47
or box of 15 for £10.08
or bulk of 75 for £43.27
£0.00  
Socket Head Cap (Allen) Screw UNF 5/16 x 3/4 inch in Zinc Plated Steel
WF29006 - expected in 4 to 6 days
sachet of 3 for £5.53
or box of 100 for £90.59
or bulk of 500 for £424.14
£0.00  
Socket Head Cap (Allen) Screw UNF 5/16 x 7/8 inch in Zinc Plated Steel
WF29007 - 35 in stock
single screw for £3.29
or box of 15 for £21.28
or bulk of 75 for £83.25
£0.00  
Socket Head Cap (Allen) Screw UNF 5/16 x 1 inch in Zinc Plated Steel
WF29008 - 44 in stock
single screw for £2.83
or box of 30 for £28.55
or bulk of 150 for £113.66
£0.00  
Socket Cap (Allen) Screw UNF 5/16 x 1-1/4 inch in Zinc Plated Steel
WF29009 - 490 in stock
single screw for £2.84
or box of 40 for £36.08
or bulk of 200 for £149.69
£0.00  
Socket Cap (Allen) Screw UNF 5/16 x 1-1/2 inch in Zinc Plated Steel
WF29010 - 202 in stock
single screw for £3.65
or box of 10 for £17.52
or bulk of 50 for £69.84
£0.00  
Socket Cap (Allen) Screw UNF 5/16 x 1-3/4 inch in Zinc Plated Steel
WF29011 - expected in 6 to 9 days
single screw for £3.09
or box of 8 for £9.97
or bulk of 40 for £42.89
£0.00  
Socket Head Cap (Allen) Screw UNF 5/16 x 2 inch in Zinc Plated Steel
WF29012 - 285 in stock
single screw for £2.45
or box of 30 for £19.49
or bulk of 150 for £74.78
£0.00  
single screw for £2.44
or box of 15 for £9.50
or bulk of 75 for £41.15
£0.00
 
single screw for £2.47
or box of 15 for £10.08
or bulk of 75 for £43.27
£0.00
 
sachet of 3 for £5.53
or box of 100 for £90.59
or bulk of 500 for £424.14
£0.00
 
single screw for £3.29
or box of 15 for £21.28
or bulk of 75 for £83.25
£0.00
 
single screw for £2.83
or box of 30 for £28.55
or bulk of 150 for £113.66
£0.00
 
single screw for £2.84
or box of 40 for £36.08
or bulk of 200 for £149.69
£0.00
 
single screw for £3.65
or box of 10 for £17.52
or bulk of 50 for £69.84
£0.00
 
single screw for £3.09
or box of 8 for £9.97
or bulk of 40 for £42.89
£0.00
 
single screw for £2.45
or box of 30 for £19.49
or bulk of 150 for £74.78
£0.00
 
Prices are subject to quantity discounts based on a sliding scale. Enter the desired quantity in the relevant box in the table above. This will automatically calculate a line price indicating the applicable rate for the quantities selected. All prices shown exclude VAT.
technical drawing of UNF Socket Head Cap Screws ASME B18. 3-2003
Technical Summary
d nominal diameter 5/16
tpi threads per inch 24
b minimum thread length 1.12
dk head diameter 0.469
k max. maximum head height 0.312
t min. minimum recess depth 0.151
s drive size 1/4
Standard ASME B18.8
all dimensions in inches
Datasheet
FSB logo CBI logo