Socket Head Screws

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Expected delivery: Wed, Nov 18

Socket head screws are driven with a hex key, so they fit in tight spaces where a wrench cannot swing. Machine builders, tool and die shops and maintenance crews use them on fixtures, dies, motor mounts and guards. This section includes standard socket head cap screws, low head cap screws, button head and flat head socket screws, shoulder screws and set screws, in UNC, UNF and metric threads.

What to check before you order

Material. Black-oxide alloy steel is heat treated for high strength and is the usual choice for machinery. 18-8 and 316 stainless resist corrosion but are not as strong as alloy.
Head style. Standard heads give the most drive strength. Button heads have a low, rounded profile for guards and panels. Flat heads sit flush in an 82 degree countersink on inch screws and 90 degrees on metric.
Drive size. Check that your hex key set covers the drive. A worn key strips the socket, so replace keys that are rounded.
Set screw point. Cup point is the common choice for gripping a shaft. Flat point is used where the shaft will be adjusted often, and dog point locates in a hole or groove.

Common questions

How is a flat head socket screw measured?

Overall, from the top of the head to the tip, because the head sits flush with the surface.

See the fasteners category, machine screws for slotted and Phillips styles, and our thread sizes guide.

Socket Head Screws: page 38

Approved Vendor M4-0.7x8 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 4622500 $177.33
Approved Vendor M4-0.7x8 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 2842500 $147.50
Approved Vendor M4-0.7x8 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 599 $0.19
Approved Vendor M5 x 10MM x M4-0.7 Allen Socket Stainless Steel Shoulder Bolts SKU 1793 $11.84
Approved Vendor M5 x 12MM x M4-0.7 Allen Socket Stainless Steel Shoulder Bolts SKU 1794 $13.52
Approved Vendor M5 x 16MM x M4-0.7 Allen Socket Stainless Steel Shoulder Bolts SKU 1795 $14.48
Approved Vendor M5 x 20MM x M4-0.7 Allen Socket Stainless Steel Shoulder Bolts SKU 1796 $14.86
Approved Vendor M5 x 25MM x M4-0.7 Allen Socket Stainless Steel Shoulder Bolts SKU 1797 $15.43
Approved Vendor M5 x 4MM x M4-0.7 Allen Socket Stainless Steel Shoulder Bolts SKU 1790 $11.20
Approved Vendor M5 x 6MM x M4-0.7 Allen Socket Stainless Steel Shoulder Bolts SKU 1791 $11.27
Approved Vendor M5 x 8MM x M4-0.7 Allen Socket Stainless Steel Shoulder Bolts SKU 1792 $11.54
Approved Vendor M5-0.80x10 Class 10.9 Low Socket Head Cap Screws Thermal Black Oxide SKU 28892 $0.34
Approved Vendor M5-0.8x10 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4822500 $220.63
Approved Vendor M5-0.8x10 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 4832500 $222.91
Approved Vendor M5-0.8x10 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3022500 $172.60
Approved Vendor M5-0.8x10 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3032500 $198.41
Approved Vendor M5-0.8x10 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 620 $0.16
Approved Vendor M5-0.8x10 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 621 $0.25
Approved Vendor M5-0.8x12 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4842500 $233.15
Approved Vendor M5-0.8x12 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 4852500 $236.98
Vanguard M5-0.8x12 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3042500 $176.79
Approved Vendor M5-0.8x12 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3052500 $205.84
Approved Vendor M5-0.8x12 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 622 $0.16
Approved Vendor M5-0.8x12 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 623 $0.24
Approved Vendor M5-0.8x14 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4862500 $236.33
Approved Vendor M5-0.8x14 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 4872500 $242.73
Approved Vendor M5-0.8x14 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3062500 $189.49
Approved Vendor M5-0.8x14 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 624 $0.28
Approved Vendor M5-0.8x15 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 625 $0.18
Approved Vendor M5-0.8x16 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4882500 $248.66
Approved Vendor M5-0.8x16 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3072500 $216.92
Approved Vendor M5-0.8x16 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3082500 $252.26
Approved Vendor M5-0.8x16 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 627 $0.31
Approved Vendor M5-0.8x18 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 628 $0.19
Approved Vendor M5-0.8x20 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4892500 $262.50
Approved Vendor M5-0.8x20 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 4902500 $275.14
Approved Vendor M5-0.8x20 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3092500 $252.98
Approved Vendor M5-0.8x20 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3102500 $293.95
Approved Vendor M5-0.8x20 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 629 $0.20
Approved Vendor M5-0.8x20 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 630 $0.30
Approved Vendor M5-0.8x25 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4912500 $303.89
Approved Vendor M5-0.8x25 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 4922500 $319.16
Approved Vendor M5-0.8x25 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3112500 $281.79
Approved Vendor M5-0.8x25 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3122500 $331.68
Approved Vendor M5-0.8x25 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 631 $0.21
Approved Vendor M5-0.8x25 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 632 $0.41
Approved Vendor M5-0.8x30 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4932500 $338.75
Approved Vendor M5-0.8x30 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 4942500 $357.26

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