Socket Head Screws

2,000+ products

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 41

Approved Vendor M6-1.0x50 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 519 $0.62
Approved Vendor M6-1.0x50 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3381000 $248.65
Approved Vendor M6-1.0x60 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 520 $0.75
Approved Vendor M6-1.0x60 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3391000 $308.19
Approved Vendor M6-1.0x70 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 521 $0.85
Approved Vendor M6-1.0x70 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 340800 $304.44
Approved Vendor M6-1.0x8 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4982500 $253.46
Approved Vendor M6-1.0x8 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 4992500 $280.95
Approved Vendor M6-1.0x8 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3182500 $198.65
Approved Vendor M6-1.0x8 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 641 $0.37
Approved Vendor M6-1.0x80 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 341700 $301.26
Approved Vendor M6-1.0x90 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 342600 $291.54
Approved Vendor M8 x 10MM x M6-1.0 Allen Socket Stainless Steel Shoulder Bolts SKU 1807 $11.92
Approved Vendor M8 x 12MM x M6-1.0 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26288 $3.78
Approved Vendor M8 x 12MM x M6-1.0 Allen Socket Stainless Steel Shoulder Bolts SKU 1808 $12.79
Approved Vendor M8 x 16MM x M6-1.0 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26289 $3.92
Approved Vendor M8 x 16MM x M6-1.0 Allen Socket Stainless Steel Shoulder Bolts SKU 1809 $13.38
Approved Vendor M8 x 20MM x M6-1.0 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26290 $4.03
Approved Vendor M8 x 20MM x M6-1.0 Allen Socket Stainless Steel Shoulder Bolts SKU 1810 $14.07
Approved Vendor M8 x 25MM x M6-1.0 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26291 $4.25
Approved Vendor M8 x 25MM x M6-1.0 Allen Socket Stainless Steel Shoulder Bolts SKU 1811 $14.76
Approved Vendor M8 x 30MM x M6-1.0 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26292 $4.51
Approved Vendor M8 x 30MM x M6-1.0 Allen Socket Stainless Steel Shoulder Bolts SKU 1812 $15.38
Approved Vendor M8 x 40MM x M6-1.0 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26296 $5.10
Approved Vendor M8 x 50MM x M6-1.0 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26293 $5.81
Approved Vendor M8 x 60MM x M6-1.0 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26294 $7.08
Approved Vendor M8 x 70MM x M6-1.0 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26295 $7.90
Approved Vendor M8 x 8MM x M6-1.0 Allen Socket Stainless Steel Shoulder Bolts SKU 1806 $11.58
Approved Vendor M8-1.25x10 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 522 $0.44
Approved Vendor M8-1.25x10 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3442500 $338.69
Approved Vendor M8-1.25x10 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 669 $0.82
Approved Vendor M8-1.25x10 Class 45H Knurled Cup Point Allen Socket Set Screws Black Oxide SKU 28841 $0.26
Approved Vendor M8-1.25x100 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 367300 $282.59
Approved Vendor M8-1.25x100 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 697 $1.67
Approved Vendor M8-1.25x110 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 368300 $596.46
Approved Vendor M8-1.25x12 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 523 $0.42
Approved Vendor M8-1.25x12 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 524 $0.52
Approved Vendor M8-1.25x12 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3452000 $290.96
Approved Vendor M8-1.25x12 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3462000 $359.44
Approved Vendor M8-1.25x12 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 670 $0.53
Approved Vendor M8-1.25x12 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 671 $0.84
Approved Vendor M8-1.25x120 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 369250 $589.73
Approved Vendor M8-1.25x15 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 672 $0.58
Approved Vendor M8-1.25x16 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 525 $0.49
Approved Vendor M8-1.25x16 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 526 $0.61
Approved Vendor M8-1.25x16 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3471500 $252.58
Approved Vendor M8-1.25x16 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3481500 $311.27
Approved Vendor M8-1.25x16 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 674 $0.76

More in Fasteners