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

A countersunk headed screw conforming with ASME/ANSI B18.3, requiring a hex key (otherwise known as an Allen key) to fit. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. Generally manufactured with a full thread, though occasionally some stock may include a partially threaded shank.
Image of UNC Socket Head Countersunk Screws ASME B18.3-2012 in A2 image
technical drawing of UNC Socket Head Countersunk Screws ASME B18.3-2012
Technical Summary
d nominal diameter 4-40
tpi threads per inch 40
dk head diameter 0.212
k head height 0.083
s drive size 1/16
all dimensions in inches
Datasheet
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Description Sale Qtys Qty Price Breakdown Despatch Estimate
4-40 x 1/4 UNC Socket Head Countersunk Screw in A2 Stainless
WF17194 - 1233 in stock
sachet of 4 for £1.37
or box of 100 for £6.09
or bulk of 500 for £28.05
£0.00  
4-40 x 5/16 UNC Socket Head Countersunk Screw in A2 Stainless
WF17195 - 720 in stock
sachet of 4 for £0.88
or box of 300 for £11.85
or bulk of 1500 for £45.79
£0.00  
4-40 x 3/8 UNC Socket Head Countersunk Screw in A2 Stainless
WF17196 - 1092 in stock
sachet of 4 for £1.17
or box of 300 for £15.65
or bulk of 1500 for £57.33
£0.00  
4-40 x 1/2 UNC Socket Head Countersunk Screw in A2 Stainless
WF17197 - 241 in stock
sachet of 3 for £1.35
or box of 100 for £8.03
or bulk of 500 for £34.01
£0.00  
4-40 x 5/8 UNC Socket Head Countersunk Screw in A2 Stainless
WF17198 - 607 in stock
sachet of 3 for £1.07
or box of 200 for £12.82
or bulk of 1000 for £48.79
£0.00  
4-40 x 3/4 UNC Socket Head Countersunk Screw in A2 Stainless
WF17199 - 264 in stock
sachet of 3 for £1.69
or box of 200 for £20.03
or bulk of 1000 for £70.71
£0.00  
4-40 x 1 UNC Socket Head Countersunk Screw in A2 Stainless
WF17201 - 2131 in stock
sachet of 3 for £1.21
or box of 200 for £14.40
or bulk of 1000 for £53.82
£0.00  
sachet of 4 for £1.37
or box of 100 for £6.09
or bulk of 500 for £28.05
£0.00
 
sachet of 4 for £0.88
or box of 300 for £11.85
or bulk of 1500 for £45.79
£0.00
 
sachet of 4 for £1.17
or box of 300 for £15.65
or bulk of 1500 for £57.33
£0.00
 
sachet of 3 for £1.35
or box of 100 for £8.03
or bulk of 500 for £34.01
£0.00
 
sachet of 3 for £1.07
or box of 200 for £12.82
or bulk of 1000 for £48.79
£0.00
 
sachet of 3 for £1.69
or box of 200 for £20.03
or bulk of 1000 for £70.71
£0.00
 
sachet of 3 for £1.21
or box of 200 for £14.40
or bulk of 1000 for £53.82
£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 Countersunk Screws ASME B18.3-2012
Technical Summary
d nominal diameter 4-40
tpi threads per inch 40
dk head diameter 0.212
k head height 0.083
s drive size 1/16
all dimensions in inches
Datasheet
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