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Socket Head Cap (Allen) Screw UNC 5/16 x 7/8 inch in Zinc Plated Steel - ASME B18.3

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 7/8 inch in Zinc Plated Steel
WF28991
£3.84
Socket Head Cap (Allen) Screw UNC 5/16 x 7/8 inch in Zinc Plated Steel   WF28991
£3.84
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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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