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 33

Approved Vendor M12-1.75x120 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 761 $3.96
Approved Vendor M12-1.75x120 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 762 $7.50
Approved Vendor M12-1.75x15 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 732 $1.57
Approved Vendor M12-1.75x150 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 763 $5.64
Approved Vendor M12-1.75x16 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 563 $1.41
Approved Vendor M12-1.75x16 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 395600 $295.76
Approved Vendor M12-1.75x18 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 733 $1.27
Approved Vendor M12-1.75x20 Class 10.9 Low Socket Head Cap Screws Thermal Black Oxide SKU 28889 $2.44
Approved Vendor M12-1.75x20 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 564 $1.52
Approved Vendor M12-1.75x20 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 565 $1.89
Approved Vendor M12-1.75x20 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 396500 $244.38
Approved Vendor M12-1.75x20 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 734 $1.23
Approved Vendor M12-1.75x20 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 735 $1.89
Approved Vendor M12-1.75x25 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 566 $1.71
Approved Vendor M12-1.75x25 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 567 $2.13
Approved Vendor M12-1.75x25 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 397500 $292.84
Approved Vendor M12-1.75x25 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 398500 $362.17
Approved Vendor M12-1.75x25 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 736 $1.17
Approved Vendor M12-1.75x25 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 737 $2.09
Approved Vendor M12-1.75x30 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 568 $1.97
Approved Vendor M12-1.75x30 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 569 $2.44
Approved Vendor M12-1.75x30 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 399400 $270.65
Approved Vendor M12-1.75x30 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 400400 $334.30
Approved Vendor M12-1.75x30 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 738 $1.27
Approved Vendor M12-1.75x30 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 739 $2.62
Approved Vendor M12-1.75x35 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 570 $2.20
Approved Vendor M12-1.75x35 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 571 $2.72
Approved Vendor M12-1.75x35 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 401300 $231.24
Approved Vendor M12-1.75x35 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 402300 $284.96
Approved Vendor M12-1.75x35 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 740 $1.37
Approved Vendor M12-1.75x35 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 741 $2.83
Approved Vendor M12-1.75x40 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 572 $2.39
Approved Vendor M12-1.75x40 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 403300 $253.52
Approved Vendor M12-1.75x40 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 404300 $312.77
Approved Vendor M12-1.75x40 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 742 $1.44
Approved Vendor M12-1.75x40 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 743 $2.71
Approved Vendor M12-1.75x45 Class 10.9 Low Socket Head Cap Screws Thermal Black Oxide SKU 28888 $3.96
Approved Vendor M12-1.75x45 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 573 $2.58
Approved Vendor M12-1.75x45 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 405300 $275.61
Approved Vendor M12-1.75x45 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 745 $3.29
Approved Vendor M12-1.75x45 Class 45H Cup Point Allen Socket Set Screws Black Oxide SKU 28861 $3.25
Approved Vendor M12-1.75x50 Class 10.9 Low Socket Head Cap Screws Thermal Black Oxide SKU 28887 $4.30
Approved Vendor M12-1.75x50 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 574 $2.87
Approved Vendor M12-1.75x50 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 406300 $297.78
Approved Vendor M12-1.75x50 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 746 $1.76
Approved Vendor M12-1.75x50 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 747 $3.59
Approved Vendor M12-1.75x60 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 575 $3.34
Approved Vendor M12-1.75x60 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 407250 $303.18

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