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Socket Head Cap (Allen) Screw UNC 1/2 x 4 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 1/2
tpi threads per inch 13
dk head diameter 0.750
k head height 0.500
t recess depth 0.245
s drive size 3/8
b minimum thread length 1.50-2.38
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 1/2 x 4 inch in Zinc Plated Steel
WF29081
£19.02
Socket Head Cap (Allen) Screw UNC 1/2 x 4 inch in Zinc Plated Steel   WF29081
£19.02
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technical drawing of UNC Socket Head Cap Screws ASME B18.3-2012
Technical Summary
d nominal diameter 1/2
tpi threads per inch 13
dk head diameter 0.750
k head height 0.500
t recess depth 0.245
s drive size 3/8
b minimum thread length 1.50-2.38
Standard ASME B18.3
all dimensions in inches
Datasheet
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