Home / UNC Bolts, Nuts and Washers / 4-40 inch UNC Phillips Csk Machine Screws ASME B18.6.3 in A2 Stainless Steel

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4-40 inch UNC Phillips Csk Machine Screws ASME B18.6.3 in A2 Stainless Steel

A popular machine screw with a phillips drive. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. These items are always fully threaded. Conforms to ASME B18.6.3. Typically found on consumer electronics and other small machinery where high torque fasteners are not necessary.

Image of UNC Phillips Csk Machine Screws ASME B18.6.3 in A2 image

technical drawing of UNC Phillips Csk Machine Screws ASME B18.6.3

Technical Summary

nominal diameter

4-40

tpi

threads per inch

head diameter

0.212

head height

0.067

drive size

Standard

ASME B16.6.3-2003

all dimensions in inches

Datasheet

< View All Sizes

Description	Sale Qtys	Price
Machine Screw Phillips Countersunk UNC 4-40 x 1/8 inch in A2 Stainless WF23801 - 2026 in stock	sachet of 2 for £0.51 or box of 100 for £7.74 or bulk of 500 for £31.09	£0.00
Machine Screw Phillips Csk UNC 4-40 x 3/16 inch in A2 Stainless WF21120 - 9571 in stock	sachet of 5 for £1.24 or box of 300 for £22.42 or bulk of 1500 for £66.15	£0.00
Machine Screw Phillips Countersunk UNC 4-40 x 1/4 inch in A2 Stainless WF23802 - 2388 in stock	sachet of 8 for £1.41 or box of 400 for £21.33 or bulk of 2000 for £63.97	£0.00
Machine Screw Phillips Csk UNC 4-40 x 5/16 inch in A2 Stainless WF23803 - 1261 in stock	sachet of 5 for £1.38 or box of 300 for £24.62 or bulk of 1500 for £72.58	£0.00
Machine Screw Phillips Countersunk UNC 4-40 x 3/8 inch in A2 Stainless WF23804 - 361 in stock	sachet of 5 for £0.85 or box of 300 for £15.62 or bulk of 1500 for £50.35	£0.00
Machine Screw Phillips Csk UNC 4-40 x 7/16 inch in A2 Stainless WF23805 - 177 in stock	sachet of 5 for £3.18 or box of 300 for £47.41 or bulk of 1500 for £186.52	£0.00
Machine Screw Phillips Countersunk UNC 4-40 x 1/2 inch in A2 Stainless WF23806 - 3691 in stock	sachet of 8 for £2.22 or box of 300 for £24.74 or bulk of 1500 for £73.14	£0.00
Machine Screw Phillips Countersunk UNC 4-40 x 5/8 inch in A2 Stainless WF23807 - 300 in stock	sachet of 5 for £1.27 or box of 300 for £23.08 or bulk of 1500 for £68.35	£0.00
Machine Screw Phillips Countersunk UNC 4-40 x 3/4 inch in A2 Stainless WF23808 - 1182 in stock	sachet of 5 for £1.33 or box of 300 for £24.25 or bulk of 1500 for £71.18	£0.00
Machine Screw Phillips Countersunk UNC 4-40 x 7/8 inch in A2 Stainless WF23809 - 358 in stock	sachet of 3 for £1.49 or box of 150 for £22.41 or bulk of 750 for £66.44	£0.00
Machine Screw Phillips Csk UNC 4-40 x 1-1/4 inch in A2 Stainless WF23810 - 4754 in stock	sachet of 2 for £0.67 or box of 100 for £10.20 or bulk of 500 for £37.44	£0.00
Machine Screw Phillips Csk UNC 4-40 x 1-3/4 inch in A2 Stainless WF23811 - 659 in stock	sachet of 2 for £2.34 or box of 80 for £26.17 or bulk of 400 for £80.35	£0.00
Machine Screw Phillips Countersunk UNC 4-40 x 2 inch in A2 Stainless WF23812 - 1724 in stock	sachet of 2 for £1.83 or box of 80 for £22.15 or bulk of 400 for £65.96	£0.00

Machine Screw Phillips Countersunk UNC 4-40 x 1/8 inch in A2 Stainless
WF23801 - 2026 in stock

sachet of 2 for £0.51
or box of 100 for £7.74
or bulk of 500 for £31.09

£0.00

Machine Screw Phillips Csk UNC 4-40 x 3/16 inch in A2 Stainless
WF21120 - 9571 in stock

sachet of 5 for £1.24
or box of 300 for £22.42
or bulk of 1500 for £66.15

£0.00

Machine Screw Phillips Countersunk UNC 4-40 x 1/4 inch in A2 Stainless
WF23802 - 2388 in stock

sachet of 8 for £1.41
or box of 400 for £21.33
or bulk of 2000 for £63.97

£0.00

Machine Screw Phillips Csk UNC 4-40 x 5/16 inch in A2 Stainless
WF23803 - 1261 in stock

sachet of 5 for £1.38
or box of 300 for £24.62
or bulk of 1500 for £72.58

£0.00

Machine Screw Phillips Countersunk UNC 4-40 x 3/8 inch in A2 Stainless
WF23804 - 361 in stock

sachet of 5 for £0.85
or box of 300 for £15.62
or bulk of 1500 for £50.35

£0.00

Machine Screw Phillips Csk UNC 4-40 x 7/16 inch in A2 Stainless
WF23805 - 177 in stock

sachet of 5 for £3.18
or box of 300 for £47.41
or bulk of 1500 for £186.52

£0.00

Machine Screw Phillips Countersunk UNC 4-40 x 1/2 inch in A2 Stainless
WF23806 - 3691 in stock

sachet of 8 for £2.22
or box of 300 for £24.74
or bulk of 1500 for £73.14

£0.00

Machine Screw Phillips Countersunk UNC 4-40 x 5/8 inch in A2 Stainless
WF23807 - 300 in stock

sachet of 5 for £1.27
or box of 300 for £23.08
or bulk of 1500 for £68.35

£0.00

Machine Screw Phillips Countersunk UNC 4-40 x 3/4 inch in A2 Stainless
WF23808 - 1182 in stock

sachet of 5 for £1.33
or box of 300 for £24.25
or bulk of 1500 for £71.18

£0.00

Machine Screw Phillips Countersunk UNC 4-40 x 7/8 inch in A2 Stainless
WF23809 - 358 in stock

sachet of 3 for £1.49
or box of 150 for £22.41
or bulk of 750 for £66.44

£0.00

Machine Screw Phillips Csk UNC 4-40 x 1-1/4 inch in A2 Stainless
WF23810 - 4754 in stock

sachet of 2 for £0.67
or box of 100 for £10.20
or bulk of 500 for £37.44

£0.00

Machine Screw Phillips Csk UNC 4-40 x 1-3/4 inch in A2 Stainless
WF23811 - 659 in stock

sachet of 2 for £2.34
or box of 80 for £26.17
or bulk of 400 for £80.35

£0.00

Machine Screw Phillips Countersunk UNC 4-40 x 2 inch in A2 Stainless
WF23812 - 1724 in stock

sachet of 2 for £1.83
or box of 80 for £22.15
or bulk of 400 for £65.96

£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

0.212

head height

0.067

drive size

Standard

ASME B16.6.3-2003

all dimensions in inches

Datasheet