Westfield Fasteners Ltd Logo
Westfield Fasteners Ltd Telephone: 01844201133, Email: enquiries@westfieldfasteners.co.uk
Home   /   UNC Bolts, Nuts and Washers   /   7/8 x 3-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless - ASME B18.3/ASTM F837(CW)

7/8 x 3-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless - ASME B18.3/ASTM F837(CW)

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 A2 image
technical drawing of UNC Socket Head Cap Screws ASME B18.3-2012
Technical Summary
d nominal diameter 7/8
tpi threads per inch 9
dk head diameter 1.312
k head height 0.875
t recess depth 0.432
s drive size 3/4
b minimum thread length 2.25-3.69
Standard ASME B18.3/ASTM F837(CW)
all dimensions in inches
Datasheet
< View Other Lengths
Description Sale Qtys Qty Price Breakdown Despatch Estimate
7/8 x 3-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF36180
£51.01
7/8 x 3-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless   WF36180
£51.01
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 7/8
tpi threads per inch 9
dk head diameter 1.312
k head height 0.875
t recess depth 0.432
s drive size 3/4
b minimum thread length 2.25-3.69
Standard ASME B18.3/ASTM F837(CW)
all dimensions in inches
Datasheet
FSB logo CBI logo