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1/2 inch UNC Socket Head Cap Screws ASME B18.3-2012 in Bright Zinc Plated (BZP) 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 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 3/4 inch in Zinc Plated Steel
WF29068 - 41 in stock
single screw for £4.90
or box of 4 for £11.68
or bulk of 20 for £48.99
£0.00  
Socket Head Cap (Allen) Screw UNC 1/2 x 1 inch in Zinc Plated Steel
WF29070 - 139 in stock
single screw for £4.78
or box of 4 for £11.24
or bulk of 20 for £47.47
£0.00  
Socket Cap (Allen) Screw UNC 1/2 x 1-1/4 inch in Zinc Plated Steel
WF29071 - 376 in stock
single screw for £5.68
or box of 5 for £18.23
or bulk of 25 for £72.30
£0.00  
Socket Cap (Allen) Screw UNC 1/2 x 1-1/2 inch in Zinc Plated Steel
WF29072 - 30 in stock
single screw for £6.26
or box of 3 for £12.54
or bulk of 15 for £52.03
£0.00  
Socket Cap (Allen) Screw UNC 1/2 x 1-3/4 inch in Zinc Plated Steel
WF29073 - 20 in stock
single screw for £6.55
or box of 3 for £13.34
or bulk of 15 for £54.97
£0.00  
Socket Head Cap (Allen) Screw UNC 1/2 x 2 inch in Zinc Plated Steel
WF29074 - 202 in stock
single screw for £10.15
or box of 10 for £62.70
or bulk of 50 for £283.76
£0.00  
Socket Cap (Allen) Screw UNC 1/2 x 2-1/4 inch in Zinc Plated Steel
WF29075 - 9 in stock
single screw for £7.05
or box of 8 for £35.23
or bulk of 40 for £145.76
£0.00  
Socket Cap (Allen) Screw UNC 1/2 x 2-1/2 inch in Zinc Plated Steel
WF29076 - 20 in stock
single screw for £8.07
or box of 2 for £11.70
or bulk of 10 for £49.06
£0.00  
Socket Cap (Allen) Screw UNC 1/2 x 2-3/4 inch in Zinc Plated Steel
WF29077 - 6 in stock
single screw for £8.48
or box of 2 for £12.49
or bulk of 10 for £51.87
£0.00  
Socket Head Cap (Allen) Screw UNC 1/2 x 3 inch in Zinc Plated Steel
WF29078 - 39 in stock
single screw for £10.75
or box of 2 for £16.67
or bulk of 10 for £66.84
£0.00  
Socket Cap (Allen) Screw UNC 1/2 x 3-1/2 inch in Zinc Plated Steel
WF29080 - 34 in stock
single screw for £4.14
or box of 8 for £17.81
or bulk of 40 for £68.19
£0.00  
Socket Head Cap (Allen) Screw UNC 1/2 x 4 inch in Zinc Plated Steel
WF29081 - expected in 6 to 9 days
single screw for £11.25
or box of 2 for £17.61
or bulk of 10 for £70.15
£0.00  
Socket Cap (Allen) Screw UNC 1/2 x 4-1/2 inch in Zinc Plated Steel
WF29082 - 76 in stock
single screw for £10.97
or box of 2 for £17.09
or bulk of 10 for £68.20
£0.00  
Socket Head Cap (Allen) Screw UNC 1/2 x 6 inch in Zinc Plated Steel
WF29085 - expected in 4 to 6 days
single screw for £12.41
or box of 2 for £19.76
or bulk of 10 for £77.32
£0.00  
single screw for £4.90
or box of 4 for £11.68
or bulk of 20 for £48.99
£0.00
 
single screw for £4.78
or box of 4 for £11.24
or bulk of 20 for £47.47
£0.00
 
single screw for £5.68
or box of 5 for £18.23
or bulk of 25 for £72.30
£0.00
 
single screw for £6.26
or box of 3 for £12.54
or bulk of 15 for £52.03
£0.00
 
single screw for £6.55
or box of 3 for £13.34
or bulk of 15 for £54.97
£0.00
 
single screw for £10.15
or box of 10 for £62.70
or bulk of 50 for £283.76
£0.00
 
single screw for £7.05
or box of 8 for £35.23
or bulk of 40 for £145.76
£0.00
 
single screw for £8.07
or box of 2 for £11.70
or bulk of 10 for £49.06
£0.00
 
single screw for £8.48
or box of 2 for £12.49
or bulk of 10 for £51.87
£0.00
 
single screw for £10.75
or box of 2 for £16.67
or bulk of 10 for £66.84
£0.00
 
single screw for £4.14
or box of 8 for £17.81
or bulk of 40 for £68.19
£0.00
 
single screw for £11.25
or box of 2 for £17.61
or bulk of 10 for £70.15
£0.00
 
single screw for £10.97
or box of 2 for £17.09
or bulk of 10 for £68.20
£0.00
 
single screw for £12.41
or box of 2 for £19.76
or bulk of 10 for £77.32
£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 1/2
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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