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4-40 inch UNC Socket Head Button Screws ASME B18.3-2012 in Bright Zinc Plated (BZP) 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 BZP 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
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Description Sale Qtys Qty Price Breakdown Despatch Estimate
Socket Head Button Screw UNC 4-40 x 1/4 inch in Zinc Plated Steel
WF27768 - 637 in stock		 sachet of 2 for £1.08
or box of 60 for £11.91
or bulk of 300 for £46.75		 £0.00  
Socket Head Button Screw UNC 4-40 x 3/8 inch in Zinc Plated Steel
WF27769 - 37 in stock		 sachet of 2 for £1.16
or box of 60 for £12.68
or bulk of 300 for £50.58		 £0.00  
Socket Head Button Screw UNC 4-40 x 1/2 inch in Zinc Plated Steel
WF27770 - 375 in stock		 sachet of 2 for £1.90
or box of 60 for £20.10
or bulk of 300 for £87.26		 £0.00  
Socket Head Button Screw UNC 4-40 x 1/4 inch in Zinc Plated Steel
WF27768 - 637 in stock
sachet of 2 for £1.08
or box of 60 for £11.91
or bulk of 300 for £46.75
£0.00
 
Socket Head Button Screw UNC 4-40 x 3/8 inch in Zinc Plated Steel
WF27769 - 37 in stock
sachet of 2 for £1.16
or box of 60 for £12.68
or bulk of 300 for £50.58
£0.00
 
Socket Head Button Screw UNC 4-40 x 1/2 inch in Zinc Plated Steel
WF27770 - 375 in stock
sachet of 2 for £1.90
or box of 60 for £20.10
or bulk of 300 for £87.26
£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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