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Socket Shoulder Screw UNC 4-40 with 1/8 x 1/2 Inch Shoulder in A2 Stainless - ASME B18.3

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
d nominal diameter 4-40
D 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
s drive size 5/64 (0.078)
d decimal nominal diameter decimal 0.1120
tpi threads per inch 40
b minimum thread length 0.157
Standard ASME B18.3
all dimensions in inches
datasheet
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Description Sale Qtys Qty Price Breakdown Despatch Estimate
Socket Shoulder Screw UNC 4-40 with 1/8 x 1/2 Inch Shoulder in A2 Stainless
WF60652
£3.54
Socket Shoulder Screw UNC 4-40 with 1/8 x 1/2 Inch Shoulder in A2 Stainless   WF60652
£3.54
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technical drawing of UNC Socket Head Shoulder Screws ASME B18.3-2012
Technical Summary
d nominal diameter 4-40
D 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
s drive size 5/64 (0.078)
d decimal nominal diameter decimal 0.1120
tpi threads per inch 40
b minimum thread length 0.157
Standard ASME B18.3
all dimensions in inches
datasheet
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