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4-40 inch UNC Socket Head Button Screws ASME B18.3-2012 in A2 Stainless Steel

A popular and attractive socket head screw, typically used where aesthetics are important, or where a lower profile domed finish is required. The hex drive is generally smaller than other hex driven ranges and thus the ultimate tightening torque is reduced. Manufactured to ASME/ANSI B18.3, and always fully threaded.
Image of UNC Socket Head Button Screws ASME B18.3-2012 in A2 image
technical drawing of UNC Socket Head Button Screws ASME B18.3-2012
Technical Summary
d nominal diameter 4-40
tpi threads per inch 40
dk head diameter 0.213
k head height 0.052
t recess depth 0.035
s drive size 1/16
Standard ASME B18.3
all dimensions in inches
Datasheet
< View All Sizes
Description Sale Qtys Qty Price Breakdown Despatch Estimate
4-40 x 1/8 UNC Socket Head Button (Dome) Screw in A2 Stainless
WF17138 - 785 in stock
sachet of 3 for £1.87
or box of 300 for £29.46
or bulk of 1500 for £109.25
£0.00  
4-40 x 3/16 UNC Socket Head Button (Dome) Screw in A2 Stainless
WF17139 - 1093 in stock
sachet of 4 for £1.07
or box of 300 for £14.18
or bulk of 1500 for £52.69
£0.00  
4-40 x 1/4 UNC Socket Head Button (Dome) Screw in A2 Stainless
WF17140 - 2003 in stock
sachet of 5 for £0.95
or box of 400 for £13.60
or bulk of 2000 for £51.20
£0.00  
4-40 x 5/16 UNC Socket Head Button (Dome) Screw in A2 Stainless
WF17141 - 412 in stock
sachet of 5 for £1.38
or box of 400 for £19.70
or bulk of 2000 for £69.72
£0.00  
4-40 x 3/8 UNC Socket Head Button (Dome) Screw in A2 Stainless
WF17142 - 2118 in stock
sachet of 5 for £1.59
or box of 100 for £5.65
or bulk of 500 for £26.78
£0.00  
4-40 x 1/2 UNC Socket Head Button (Dome) Screw in A2 Stainless
WF17144 - 345 in stock
sachet of 4 for £0.91
or box of 100 for £4.08
or bulk of 500 for £20.38
£0.00  
4-40 x 5/8 UNC Socket Head Button (Dome) Screw in A2 Stainless
WF17145 - 848 in stock
sachet of 4 for £1.19
or box of 300 for £15.96
or bulk of 1500 for £58.52
£0.00  
4-40 x 3/4 UNC Socket Head Button (Dome) Screw in A2 Stainless
WF17146 - 423 in stock
sachet of 3 for £1.60
or box of 300 for £26.85
or bulk of 1500 for £95.89
£0.00  
4-40 x 1 UNC Socket Head Button (Dome) Screw in A2 Stainless
WF17147 - 548 in stock
sachet of 3 for £2.02
or box of 100 for £11.95
or bulk of 500 for £46.04
£0.00  
4-40 x 1-1/4 UNC Socket Head Button (Dome) Screw in A2 Stainless
WF17148 - 521 in stock
sachet of 2 for £1.36
or box of 150 for £18.19
or bulk of 750 for £65.24
£0.00  
4-40 x 1-1/2 UNC Socket Head Button (Dome) Screw in A2 Stainless
WF17149 - 57 in stock
sachet of 2 for £1.82
or box of 150 for £24.25
or bulk of 750 for £83.48
£0.00  
sachet of 3 for £1.87
or box of 300 for £29.46
or bulk of 1500 for £109.25
£0.00
 
sachet of 4 for £1.07
or box of 300 for £14.18
or bulk of 1500 for £52.69
£0.00
 
sachet of 5 for £0.95
or box of 400 for £13.60
or bulk of 2000 for £51.20
£0.00
 
sachet of 5 for £1.38
or box of 400 for £19.70
or bulk of 2000 for £69.72
£0.00
 
sachet of 5 for £1.59
or box of 100 for £5.65
or bulk of 500 for £26.78
£0.00
 
sachet of 4 for £0.91
or box of 100 for £4.08
or bulk of 500 for £20.38
£0.00
 
sachet of 4 for £1.19
or box of 300 for £15.96
or bulk of 1500 for £58.52
£0.00
 
sachet of 3 for £1.60
or box of 300 for £26.85
or bulk of 1500 for £95.89
£0.00
 
sachet of 3 for £2.02
or box of 100 for £11.95
or bulk of 500 for £46.04
£0.00
 
sachet of 2 for £1.36
or box of 150 for £18.19
or bulk of 750 for £65.24
£0.00
 
sachet of 2 for £1.82
or box of 150 for £24.25
or bulk of 750 for £83.48
£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 Button Screws ASME B18.3-2012
Technical Summary
d nominal diameter 4-40
tpi threads per inch 40
dk head diameter 0.213
k head height 0.052
t recess depth 0.035
s drive size 1/16
Standard ASME B18.3
all dimensions in inches
Datasheet
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