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1/4 inch UNC Socket Head Cap Screws ASME B18.3-2012 in A4 Stainless 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.
Image of UNC Socket Head Cap Screws ASME B18.3-2012 in A4 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
< View All Sizes
Description Sale Qtys Qty Price Breakdown Despatch Estimate
1/4 x 3/8 UNC Socket Head Cap (Allen) Screw in A4 Stainless
WF33726 - 2158 in stock
single screw for £1.70
or box of 40 for £20.05
or bulk of 200 for £70.80
£0.00  
1/4 x 1/2 UNC Socket Head Cap (Allen) Screw in A4 Stainless
WF33727 - 1907 in stock
single screw for £1.80
or box of 40 for £21.30
or bulk of 200 for £74.65
£0.00  
1/4 x 5/8 UNC Socket Head Cap (Allen) Screw in A4 Stainless
WF33728 - 2316 in stock
single screw for £1.57
or box of 30 for £14.02
or bulk of 150 for £52.56
£0.00  
1/4 x 3/4 UNC Socket Head Cap (Allen) Screw in A4 Stainless
WF33729 - 551 in stock
single screw for £2.11
or box of 30 for £18.77
or bulk of 150 for £66.95
£0.00  
1/4 x 7/8 UNC Socket Head Cap (Allen) Screw in A4 Stainless
WF33772 - 1641 in stock
single screw for £2.15
or box of 30 for £19.16
or bulk of 150 for £68.20
£0.00  
1/4 x 1 UNC Socket Head Cap (Allen) Screw in A4 Stainless
WF33730 - 39 in stock
single screw for £0.83
or box of 40 for £10.14
or bulk of 200 for £40.66
£0.00  
1/4 x 1-1/4 UNC Socket Head Cap (Allen) Screw in A4 Stainless
WF33731 - 75 in stock
single screw for £0.96
or box of 20 for £5.84
or bulk of 100 for £27.88
£0.00  
1/4 x 1-1/2 UNC Socket Head Cap (Allen) Screw in A4 Stainless
WF33732 - 111 in stock
single screw for £2.88
or box of 15 for £17.30
or bulk of 75 for £62.40
£0.00  
1/4 x 1-3/4 UNC Socket Head Cap (Allen) Screw in A4 Stainless
WF33733 - 456 in stock
single screw for £3.04
or box of 20 for £25.39
or bulk of 100 for £88.63
£0.00  
1/4 x 2 UNC Socket Head Cap (Allen) Screw in A4 Stainless
WF33734 - 19 in stock
single screw for £3.40
or box of 15 for £24.58
or bulk of 75 for £84.84
£0.00  
single screw for £1.70
or box of 40 for £20.05
or bulk of 200 for £70.80
£0.00
 
single screw for £1.80
or box of 40 for £21.30
or bulk of 200 for £74.65
£0.00
 
single screw for £1.57
or box of 30 for £14.02
or bulk of 150 for £52.56
£0.00
 
single screw for £2.11
or box of 30 for £18.77
or bulk of 150 for £66.95
£0.00
 
single screw for £2.15
or box of 30 for £19.16
or bulk of 150 for £68.20
£0.00
 
single screw for £0.83
or box of 40 for £10.14
or bulk of 200 for £40.66
£0.00
 
single screw for £0.96
or box of 20 for £5.84
or bulk of 100 for £27.88
£0.00
 
single screw for £2.88
or box of 15 for £17.30
or bulk of 75 for £62.40
£0.00
 
single screw for £3.04
or box of 20 for £25.39
or bulk of 100 for £88.63
£0.00
 
single screw for £3.40
or box of 15 for £24.58
or bulk of 75 for £84.84
£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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