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 40

Approved Vendor M6-1.0x12 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 503 $0.26
Approved Vendor M6-1.0x12 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3212500 $203.02
Approved Vendor M6-1.0x12 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3222500 $245.73
Approved Vendor M6-1.0x14 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 504 $0.23
Approved Vendor M6-1.0x14 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 505 $0.28
Approved Vendor M6-1.0x14 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3232500 $209.49
Approved Vendor M6-1.0x14 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3242500 $255.79
Approved Vendor M6-1.0x14 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 645 $0.34
Approved Vendor M6-1.0x15 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 646 $0.21
Approved Vendor M6-1.0x15 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 647 $0.31
Approved Vendor M6-1.0x16 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 506 $0.24
Approved Vendor M6-1.0x16 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 507 $0.30
Approved Vendor M6-1.0x16 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3252500 $222.37
Approved Vendor M6-1.0x16 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3262500 $273.34
Approved Vendor M6-1.0x18 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 649 $0.22
Approved Vendor M6-1.0x20 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 508 $0.27
Approved Vendor M6-1.0x20 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 509 $0.35
Approved Vendor M6-1.0x20 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3272500 $252.74
Approved Vendor M6-1.0x20 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3282500 $311.85
Approved Vendor M6-1.0x20 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 650 $0.21
Approved Vendor M6-1.0x20 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 651 $0.37
Approved Vendor M6-1.0x25 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 510 $0.34
Approved Vendor M6-1.0x25 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 511 $0.42
Approved Vendor M6-1.0x25 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3292200 $273.05
Approved Vendor M6-1.0x25 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3302200 $336.46
Approved Vendor M6-1.0x25 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 652 $0.24
Approved Vendor M6-1.0x25 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 653 $0.42
Approved Vendor M6-1.0x30 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 512 $0.39
Approved Vendor M6-1.0x30 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 513 $0.48
Approved Vendor M6-1.0x30 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3312000 $285.74
Approved Vendor M6-1.0x30 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3322000 $353.45
Approved Vendor M6-1.0x35 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 514 $0.43
Approved Vendor M6-1.0x35 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 515 $0.53
Approved Vendor M6-1.0x35 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3341500 $310.40
Approved Vendor M6-1.0x35 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 656 $0.33
Approved Vendor M6-1.0x35 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 657 $0.61
Approved Vendor M6-1.0x35 Class 45H Cup Point Allen Socket Set Screws Black Oxide SKU 28868 $0.75
Approved Vendor M6-1.0x40 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 516 $0.48
Approved Vendor M6-1.0x40 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 517 $0.60
Approved Vendor M6-1.0x40 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3351500 $291.36
Approved Vendor M6-1.0x40 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3361500 $360.32
Approved Vendor M6-1.0x40 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 658 $0.36
Approved Vendor M6-1.0x40 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 659 $0.61
Approved Vendor M6-1.0x40 Class 45H Cup Point Allen Socket Set Screws Black Oxide SKU 28867 $0.88
Approved Vendor M6-1.0x45 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 518 $0.55
Approved Vendor M6-1.0x45 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3371200 $265.89
Approved Vendor M6-1.0x45 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 660 $0.44
Approved Vendor M6-1.0x45 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 661 $0.74

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