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5/16 inch UNC Socket Head Cap Screws ASME B18.3-2012 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 UNC Socket Head Cap Screws ASME B18.3-2012 in BZP image
technical drawing of UNC Socket Head Cap Screws ASME B18.3-2012
Technical Summary
d nominal diameter 5/16
tpi threads per inch 18
dk head diameter 0.469
k head height 0.312
t recess depth 0.151
s drive size 1/4
b minimum thread length 1.12-1.71
Standard ASME B18.3
all dimensions in inches
Datasheet
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Description Sale Qtys Qty Price Breakdown Despatch Estimate
Socket Head Cap (Allen) Screw UNC 5/16 x 3/8 inch in Zinc Plated Steel
WF28987 - 1117 in stock
single screw for £0.91
or box of 15 for £3.60
or bulk of 75 for £18.00
£0.00  
Socket Head Cap (Allen) Screw UNC 5/16 x 1/2 inch in Zinc Plated Steel
WF28988 - 35 in stock
single screw for £2.39
or box of 15 for £9.15
or bulk of 75 for £39.92
£0.00  
Socket Head Cap (Allen) Screw UNC 5/16 x 5/8 inch in Zinc Plated Steel
WF28989 - 38 in stock
single screw for £3.14
or box of 15 for £19.24
or bulk of 75 for £75.89
£0.00  
Socket Head Cap (Allen) Screw UNC 5/16 x 3/4 inch in Zinc Plated Steel
WF28990 - 22 in stock
single screw for £3.10
or box of 15 for £18.73
or bulk of 75 for £74.11
£0.00  
Socket Head Cap (Allen) Screw UNC 5/16 x 7/8 inch in Zinc Plated Steel
WF28991 - 23 in stock
single screw for £2.71
or box of 15 for £13.32
or bulk of 75 for £54.88
£0.00  
Socket Head Cap (Allen) Screw UNC 5/16 x 1 inch in Zinc Plated Steel
WF28992 - 15 in stock
sachet of 2 for £4.89
or box of 100 for £110.94
or bulk of 500 for £528.80
£0.00  
Socket Cap (Allen) Screw UNC 5/16 x 1-1/4 inch in Zinc Plated Steel
WF28993 - 253 in stock
single screw for £1.61
or box of 40 for £17.06
or bulk of 200 for £66.50
£0.00  
Socket Cap (Allen) Screw UNC 5/16 x 1-1/2 inch in Zinc Plated Steel
WF28994 - 1 in stock
single screw for £3.23
or box of 10 for £13.67
or bulk of 50 for £56.07
£0.00  
Socket Cap (Allen) Screw UNC 5/16 x 1-3/4 inch in Zinc Plated Steel
WF28995 - 130 in stock
single screw for £3.47
or box of 8 for £12.73
or bulk of 40 for £52.71
£0.00  
Socket Head Cap (Allen) Screw UNC 5/16 x 2 inch in Zinc Plated Steel
WF28996 - 152 in stock
single screw for £2.45
or box of 8 for £5.20
or bulk of 40 for £25.99
£0.00  
Socket Cap (Allen) Screw UNC 5/16 x 2-1/4 inch in Zinc Plated Steel
WF28997 - 157 in stock
single screw for £3.70
or box of 8 for £14.49
or bulk of 40 for £59.12
£0.00  
Socket Cap (Allen) Screw UNC 5/16 x 2-1/2 inch in Zinc Plated Steel
WF28998 - 155 in stock
single screw for £3.84
or box of 6 for £11.60
or bulk of 30 for £48.70
£0.00  
Socket Cap (Allen) Screw UNC 5/16 x 2-3/4 inch in Zinc Plated Steel
WF28999 - 71 in stock
single screw for £4.30
or box of 6 for £14.17
or bulk of 30 for £57.89
£0.00  
Socket Head Cap (Allen) Screw UNC 5/16 x 3 inch in Zinc Plated Steel
WF29000 - 93 in stock
single screw for £3.81
or box of 5 for £9.51
or bulk of 25 for £41.25
£0.00  
Socket Cap (Allen) Screw UNC 5/16 x 3-1/2 inch in Zinc Plated Steel
WF29002 - 79 in stock
single screw for £4.76
or box of 5 for £13.95
or bulk of 25 for £57.13
£0.00  
Socket Head Cap (Allen) Screw UNC 5/16 x 4 inch in Zinc Plated Steel
WF29003 - 10 in stock
single screw for £5.18
or box of 4 for £12.72
or bulk of 20 for £52.72
£0.00  
single screw for £0.91
or box of 15 for £3.60
or bulk of 75 for £18.00
£0.00
 
single screw for £2.39
or box of 15 for £9.15
or bulk of 75 for £39.92
£0.00
 
single screw for £3.14
or box of 15 for £19.24
or bulk of 75 for £75.89
£0.00
 
single screw for £3.10
or box of 15 for £18.73
or bulk of 75 for £74.11
£0.00
 
single screw for £2.71
or box of 15 for £13.32
or bulk of 75 for £54.88
£0.00
 
sachet of 2 for £4.89
or box of 100 for £110.94
or bulk of 500 for £528.80
£0.00
 
single screw for £1.61
or box of 40 for £17.06
or bulk of 200 for £66.50
£0.00
 
single screw for £3.23
or box of 10 for £13.67
or bulk of 50 for £56.07
£0.00
 
single screw for £3.47
or box of 8 for £12.73
or bulk of 40 for £52.71
£0.00
 
single screw for £2.45
or box of 8 for £5.20
or bulk of 40 for £25.99
£0.00
 
single screw for £3.70
or box of 8 for £14.49
or bulk of 40 for £59.12
£0.00
 
single screw for £3.84
or box of 6 for £11.60
or bulk of 30 for £48.70
£0.00
 
single screw for £4.30
or box of 6 for £14.17
or bulk of 30 for £57.89
£0.00
 
single screw for £3.81
or box of 5 for £9.51
or bulk of 25 for £41.25
£0.00
 
single screw for £4.76
or box of 5 for £13.95
or bulk of 25 for £57.13
£0.00
 
single screw for £5.18
or box of 4 for £12.72
or bulk of 20 for £52.72
£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 UNC Socket Head Cap Screws ASME B18.3-2012
Technical Summary
d nominal diameter 5/16
tpi threads per inch 18
dk head diameter 0.469
k head height 0.312
t recess depth 0.151
s drive size 1/4
b minimum thread length 1.12-1.71
Standard ASME B18.3
all dimensions in inches
Datasheet
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