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Socket Head Cap (Allen) Screw UNC 1/4 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 1/4
tpi threads per inch 20
dk head diameter 0.375
k head height 0.250
t recess depth 0.120
s drive size 3/16
b minimum thread length 1.00-1.50
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 1/4 x 7/8 inch in Zinc Plated Steel
WF28966 - 293 in stock
sachet of 2 for £2.37
or box of 60 for £18.44
or bulk of 300 for £72.25
£0.00  
Socket Head Cap (Allen) Screw UNC 1/4 x 7/8 inch in Zinc Plated Steel   WF28966 - 293 in stock
sachet of 2 for £2.37
or box of 60 for £18.44
or bulk of 300 for £72.25
£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 1/4
tpi threads per inch 20
dk head diameter 0.375
k head height 0.250
t recess depth 0.120
s drive size 3/16
b minimum thread length 1.00-1.50
Standard ASME B18.3
all dimensions in inches
Datasheet
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