Home / UNC Bolts, Nuts and Washers / 4-40 inch UNC Socket Head Button Screws ASME B18.3-2012 in A2 Stainless Steel

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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.

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

Technical Summary

nominal diameter

4-40

tpi

threads per inch

head diameter

0.213

head height

0.052

recess depth

0.035

drive size

1/16

Standard

ASME B18.3

all dimensions in inches

Datasheet

< View All Sizes

Description	Sale Qtys	Price
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

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

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

tpi

threads per inch

head diameter

0.213

head height

0.052

recess depth

0.035

drive size

1/16

Standard

ASME B18.3

all dimensions in inches

Datasheet