Home / UNC Bolts, Nuts and Washers / 1/2 inch UNC Socket Head Cap Screws ASME B18.3-2012 in A2 Stainless Steel

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1/2 inch UNC Socket Head Cap Screws ASME B18.3-2012 in A2 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 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

nominal diameter

1/2

tpi

threads per inch

head diameter

0.750

head height

0.500

recess depth

0.245

drive size

3/8

minimum thread length

1.50-2.38

Standard

ASME B18.3/ASTM F837(CW)

all dimensions in inches

Datasheet

< View All Sizes

Description	Sale Qtys	Price
1/2 x 5/8 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF17476 - 4 in stock	single screw for £4.30 or box of 4 for £9.95 or bulk of 20 for £40.14	£0.00
1/2 x 3/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF17477 - 78 in stock	single screw for £3.23 or box of 8 for £11.88 or bulk of 40 for £45.93	£0.00
1/2 x 7/8 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF17478 - 360 in stock	single screw for £3.75 or box of 10 for £19.70 or bulk of 50 for £69.15	£0.00
1/2 x 1 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF10133 - 45 in stock	single screw for £3.86 or box of 10 for £20.78 or bulk of 50 for £72.36	£0.00
1/2 x 1-1/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF10134 - 152 in stock	single screw for £4.77 or box of 6 for £17.60 or bulk of 30 for £63.24	£0.00
1/2 x 1-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF10721 - 32 in stock	single screw for £5.76 or box of 5 for £19.35 or bulk of 25 for £68.57	£0.00
1/2 x 1-3/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF17479 - 234 in stock	single screw for £5.31 or box of 6 for £20.61 or bulk of 30 for £72.07	£0.00
1/2 x 2 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF10135 - 21 in stock	single screw for £5.73 or box of 5 for £19.17 or bulk of 25 for £67.86	£0.00
1/2 x 2-1/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF17480 - 40 in stock	single screw for £5.94 or box of 5 for £20.22 or bulk of 25 for £70.87	£0.00
1/2 x 2-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF10722 - 128 in stock	single screw for £5.82 or box of 5 for £19.64 or bulk of 25 for £69.05	£0.00
1/2 x 2-3/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF17481 - 51 in stock	single screw for £6.72 or box of 4 for £19.10 or bulk of 20 for £67.62	£0.00
1/2 x 3 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF10136 - 92 in stock	single screw for £6.70 or box of 4 for £19.04 or bulk of 20 for £67.30	£0.00
1/2 x 3-1/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF17482 - 167 in stock	single screw for £7.11 or box of 3 for £15.42 or bulk of 15 for £56.65	£0.00
1/2 x 3-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF17483 - 41 in stock	single screw for £7.60 or box of 4 for £22.36 or bulk of 20 for £77.39	£0.00
1/2 x 4 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF33388 - 163 in stock	single screw for £8.90 or box of 3 for £20.47 or bulk of 15 for £71.68	£0.00
1/2 x 4-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF36141 - 92 in stock	single screw for £10.31 or box of 3 for £24.46 or bulk of 15 for £83.59	£0.00
1/2 x 5 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF17484 - 5 in stock	single screw for £10.83 or box of 2 for £17.29 or bulk of 10 for £62.31	£0.00
1/2 x 5-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF36142 - 19 in stock	single screw for £14.27 or box of 2 for £23.77 or bulk of 10 for £81.78	£0.00
1/2 x 6 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF36143 - 73 in stock	single screw for £12.36 or box of 2 for £20.18 or bulk of 10 for £70.84	£0.00
1/2 x 6-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF36144 - 4 in stock	single screw for £14.70 or box of 2 for £24.55 or bulk of 10 for £83.98	£0.00
1/2 x 7 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF36145 - 24 in stock	single screw for £11.30	£0.00
1/2 x 8 UNC Socket Head Cap (Allen) Screw in A2 Stainless WF36146 - 9 in stock	single screw for £18.91	£0.00

1/2 x 5/8 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF17476 - 4 in stock

single screw for £4.30
or box of 4 for £9.95
or bulk of 20 for £40.14

£0.00

1/2 x 3/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF17477 - 78 in stock

single screw for £3.23
or box of 8 for £11.88
or bulk of 40 for £45.93

£0.00

1/2 x 7/8 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF17478 - 360 in stock

single screw for £3.75
or box of 10 for £19.70
or bulk of 50 for £69.15

£0.00

1/2 x 1 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF10133 - 45 in stock

single screw for £3.86
or box of 10 for £20.78
or bulk of 50 for £72.36

£0.00

1/2 x 1-1/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF10134 - 152 in stock

single screw for £4.77
or box of 6 for £17.60
or bulk of 30 for £63.24

£0.00

1/2 x 1-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF10721 - 32 in stock

single screw for £5.76
or box of 5 for £19.35
or bulk of 25 for £68.57

£0.00

1/2 x 1-3/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF17479 - 234 in stock

single screw for £5.31
or box of 6 for £20.61
or bulk of 30 for £72.07

£0.00

1/2 x 2 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF10135 - 21 in stock

single screw for £5.73
or box of 5 for £19.17
or bulk of 25 for £67.86

£0.00

1/2 x 2-1/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF17480 - 40 in stock

single screw for £5.94
or box of 5 for £20.22
or bulk of 25 for £70.87

£0.00

1/2 x 2-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF10722 - 128 in stock

single screw for £5.82
or box of 5 for £19.64
or bulk of 25 for £69.05

£0.00

1/2 x 2-3/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF17481 - 51 in stock

single screw for £6.72
or box of 4 for £19.10
or bulk of 20 for £67.62

£0.00

1/2 x 3 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF10136 - 92 in stock

single screw for £6.70
or box of 4 for £19.04
or bulk of 20 for £67.30

£0.00

1/2 x 3-1/4 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF17482 - 167 in stock

single screw for £7.11
or box of 3 for £15.42
or bulk of 15 for £56.65

£0.00

1/2 x 3-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF17483 - 41 in stock

single screw for £7.60
or box of 4 for £22.36
or bulk of 20 for £77.39

£0.00

1/2 x 4 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF33388 - 163 in stock

single screw for £8.90
or box of 3 for £20.47
or bulk of 15 for £71.68

£0.00

1/2 x 4-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF36141 - 92 in stock

single screw for £10.31
or box of 3 for £24.46
or bulk of 15 for £83.59

£0.00

1/2 x 5 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF17484 - 5 in stock

single screw for £10.83
or box of 2 for £17.29
or bulk of 10 for £62.31

£0.00

1/2 x 5-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF36142 - 19 in stock

single screw for £14.27
or box of 2 for £23.77
or bulk of 10 for £81.78

£0.00

1/2 x 6 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF36143 - 73 in stock

single screw for £12.36
or box of 2 for £20.18
or bulk of 10 for £70.84

£0.00

1/2 x 6-1/2 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF36144 - 4 in stock

single screw for £14.70
or box of 2 for £24.55
or bulk of 10 for £83.98

£0.00

1/2 x 7 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF36145 - 24 in stock

single screw for £11.30

£0.00

1/2 x 8 UNC Socket Head Cap (Allen) Screw in A2 Stainless
WF36146 - 9 in stock

single screw for £18.91

£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 Summary

nominal diameter

1/2

tpi

threads per inch

head diameter

0.750

head height

0.500

recess depth

0.245

drive size

3/8

minimum thread length

1.50-2.38

Standard

ASME B18.3/ASTM F837(CW)

all dimensions in inches

Datasheet