Home / UNC Bolts, Nuts and Washers / UNC Socket Head Shoulder Screws ASME B18.3-2012 with 1/8 inch diameter shoulder in A2 Stainless Steel

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UNC Socket Head Shoulder Screws ASME B18.3-2012 with 1/8 inch diameter shoulder in A2 Stainless Steel

Socket shoulder screw with a UNC imperial coarse thread. They are also known as shoulder bolts, precision shoulder screw and in the US, stripper bolts. The main dimensions are for the diameter and total length required under the head. Shoulder screws have an undercut portion between the thread and shoulder, allowing a close fit. They are used in a wide range of punch and die operations and as shafts, pivots, guides, pins, linkages and trunion mountings. Please note that the nominal diameter here refers to the shoulder diameter, except where shown otherwise.

Image of UNC Socket Head Shoulder Screws ASME B18.3-2012 in A2 image

technical drawing of UNC Socket Head Shoulder Screws ASME B18.3-2012

Technical Summary

nominal diameter

4-40

diameter

1/8

D max.

max. diameter

0.1230

D min.

min. diameter

0.1210

dk max.

maximum head diameter

0.250

dk min.

minimum head diameter

0.235

k max.

maximum head height

0.125

k min.

minimum head height

0.115

drive size

5/64 (0.078)

d decimal

nominal diameter decimal

0.1120

tpi

threads per inch

minimum thread length

0.157

Standard

ASME B18.3

all dimensions in inches

Datasheet

< View All Sizes

Description	Sale Qtys	Price
Socket Shoulder Screw UNC 4-40 with 1/8 x 1/8 Inch Shoulder in A2 Stainless WF60647 - 40 in stock	single screw for £2.69 or box of 8 for £20.63 or bulk of 40 for £98.75	£0.00
Socket Shoulder Screw UNC 4-40 with 1/8 x 3/16 Inch Shoulder in A2 Stainless WF60648 - expected in 6 to 9 days	single screw for £2.80 or box of 8 for £21.56 or bulk of 40 for £103.16	£0.00
Socket Shoulder Screw UNC 4-40 with 1/8 x 1/4 Inch Shoulder in A2 Stainless WF60649 - 90 in stock	sachet of 2 for £2.52 or box of 20 for £24.10 or bulk of 100 for £115.21	£0.00
Socket Shoulder Screw UNC 4-40 with 1/8 x 5/16 Inch Shoulder in A2 Stainless WF60650 - 17 in stock	single screw for £1.08 or box of 8 for £8.22 or bulk of 40 for £40.18	£0.00
Socket Shoulder Screw UNC 4-40 with 1/8 x 3/8 Inch Shoulder in A2 Stainless WF60651 - 18 in stock	single screw for £1.27 or box of 8 for £9.71 or bulk of 40 for £47.22	£0.00
Socket Shoulder Screw UNC 4-40 with 1/8 x 1/2 Inch Shoulder in A2 Stainless WF60652 - 13 in stock	single screw for £3.06 or box of 6 for £17.69 or bulk of 30 for £84.91	£0.00
Socket Shoulder Screw UNC 4-40 with 1/8 x 5/8 Inch Shoulder in A2 Stainless WF60653 - expected in 6 to 9 days	single screw for £3.03 or box of 6 for £17.50 or bulk of 30 for £84.03	£0.00
Socket Shoulder Screw UNC 4-40 with 1/8 x 3/4 Inch Shoulder in A2 Stainless WF60654 - expected in 6 to 9 days	single screw for £3.17 or box of 6 for £18.39 or bulk of 30 for £88.23	£0.00
Socket Shoulder Screw UNC 4-40 with 1/8 x 1 Inch Shoulder in A2 Stainless WF60655 - 23 in stock	single screw for £1.92 or box of 10 for £18.23 or bulk of 50 for £87.48	£0.00
Socket Shoulder Screw UNC 4-40 with 1/8 x 1-1/4 Inch Shoulder in A2 Stainless WF60656 - expected in 6 to 9 days	single screw for £3.62 or box of 5 for £17.56 or bulk of 25 for £84.28	£0.00
Socket Shoulder Screw UNC 4-40 with 1/8 x 1-1/2 Inch Shoulder in A2 Stainless WF60657 - expected in 6 to 9 days	single screw for £3.77 or box of 5 for £18.32 or bulk of 25 for £87.86	£0.00

Socket Shoulder Screw UNC 4-40 with 1/8 x 1/8 Inch Shoulder in A2 Stainless
WF60647 - 40 in stock

single screw for £2.69
or box of 8 for £20.63
or bulk of 40 for £98.75

£0.00

Socket Shoulder Screw UNC 4-40 with 1/8 x 3/16 Inch Shoulder in A2 Stainless
WF60648 - expected in 6 to 9 days

single screw for £2.80
or box of 8 for £21.56
or bulk of 40 for £103.16

£0.00

Socket Shoulder Screw UNC 4-40 with 1/8 x 1/4 Inch Shoulder in A2 Stainless
WF60649 - 90 in stock

sachet of 2 for £2.52
or box of 20 for £24.10
or bulk of 100 for £115.21

£0.00

Socket Shoulder Screw UNC 4-40 with 1/8 x 5/16 Inch Shoulder in A2 Stainless
WF60650 - 17 in stock

single screw for £1.08
or box of 8 for £8.22
or bulk of 40 for £40.18

£0.00

Socket Shoulder Screw UNC 4-40 with 1/8 x 3/8 Inch Shoulder in A2 Stainless
WF60651 - 18 in stock

single screw for £1.27
or box of 8 for £9.71
or bulk of 40 for £47.22

£0.00

Socket Shoulder Screw UNC 4-40 with 1/8 x 1/2 Inch Shoulder in A2 Stainless
WF60652 - 13 in stock

single screw for £3.06
or box of 6 for £17.69
or bulk of 30 for £84.91

£0.00

Socket Shoulder Screw UNC 4-40 with 1/8 x 5/8 Inch Shoulder in A2 Stainless
WF60653 - expected in 6 to 9 days

single screw for £3.03
or box of 6 for £17.50
or bulk of 30 for £84.03

£0.00

Socket Shoulder Screw UNC 4-40 with 1/8 x 3/4 Inch Shoulder in A2 Stainless
WF60654 - expected in 6 to 9 days

single screw for £3.17
or box of 6 for £18.39
or bulk of 30 for £88.23

£0.00

Socket Shoulder Screw UNC 4-40 with 1/8 x 1 Inch Shoulder in A2 Stainless
WF60655 - 23 in stock

single screw for £1.92
or box of 10 for £18.23
or bulk of 50 for £87.48

£0.00

Socket Shoulder Screw UNC 4-40 with 1/8 x 1-1/4 Inch Shoulder in A2 Stainless
WF60656 - expected in 6 to 9 days

single screw for £3.62
or box of 5 for £17.56
or bulk of 25 for £84.28

£0.00

Socket Shoulder Screw UNC 4-40 with 1/8 x 1-1/2 Inch Shoulder in A2 Stainless
WF60657 - expected in 6 to 9 days

single screw for £3.77
or box of 5 for £18.32
or bulk of 25 for £87.86

£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

4-40

diameter

1/8

D max.

max. diameter

0.1230

D min.

min. diameter

0.1210

dk max.

maximum head diameter

0.250

dk min.

minimum head diameter

0.235

k max.

maximum head height

0.125

k min.

minimum head height

0.115

drive size

5/64 (0.078)

d decimal

nominal diameter decimal

0.1120

tpi

threads per inch

minimum thread length

0.157

Standard

ASME B18.3

all dimensions in inches

Datasheet