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 10

Approved Vendor 1-8x5-1/2" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 13688 $43.43
Approved Vendor 1-8x6" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 13690 $48.22
Approved Vendor 1/2" x 1" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1754 $16.17
Approved Vendor 1/2" x 1" x 3/8-16" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14595 $4.15
Approved Vendor 1/2" x 1-1/2" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1756 $21.87
Approved Vendor 1/2" x 1-1/2" x 3/8-16" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14600 $5.00
Approved Vendor 1/2" x 1-1/4" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1755 $17.65
Approved Vendor 1/2" x 1-1/4" x 3/8-16" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14602 $4.92
Approved Vendor 1/2" x 1-3/4" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1757 $23.47
Approved Vendor 1/2" x 1-3/4" x 3/8-16" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14605 $5.76
Approved Vendor 1/2" x 1/2" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1751 $13.42
Approved Vendor 1/2" x 1/2" x 3/8-16"Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14624 $3.37
Approved Vendor 1/2" x 2" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1758 $24.07
Approved Vendor 1/2" x 2" x 3/8-16" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14653 $6.21
Approved Vendor 1/2" x 2-1/2" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1760 $28.39
Approved Vendor 1/2" x 2-1/2" x 3/8-16" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14656 $7.12
Approved Vendor 1/2" x 2-1/4" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1759 $25.67
Approved Vendor 1/2" x 2-3/4" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1761 $31.38
Approved Vendor 1/2" x 2-3/4" x 3/8-16" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14657 $8.70
Approved Vendor 1/2" x 3" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1762 $33.92
Approved Vendor 1/2" x 3" x 3/8-16" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14662 $9.39
Approved Vendor 1/2" x 3-1/2" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1763 $39.12
Approved Vendor 1/2" x 3-1/2" x 3/8-16"Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14663 $10.47
Approved Vendor 1/2" x 3/4" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1753 $15.34
Approved Vendor 1/2" x 3/4" x 3/8-16" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14670 $3.74
Approved Vendor 1/2" x 4" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1764 $64.32
Approved Vendor 1/2" x 4" x 3/8-16"Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14682 $11.49
Approved Vendor 1/2" x 5" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1765 $106.04
Approved Vendor 1/2" x 5" x 3/8-16" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14683 $17.50
Approved Vendor 1/2" x 5/8" x 3/8"-16 Allen Socket Stainless Steel Shoulder Bolts SKU 1752 $14.93
Approved Vendor 1/2" x 5/8" x 3/8-16'' Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14686 $4.07
Approved Vendor 1/2" x 6" x 3/8-16" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 14697 $36.47
Approved Vendor 1/2"-13x1" Brass Flat Head Socket Cap Screw SKU 14852 $10.64
Approved Vendor 1/2"-13x1" Brass Socket Head Cap Screw SKU 14853 $17.05
Approved Vendor 1/2"-13x1" Low Socket Head Cap Screws Thermal Black Oxide SKU 14855 $3.18
Approved Vendor 1/2"-13x1-1/2" Brass Flat Head Socket Cap Screw SKU 14859 $14.44
Approved Vendor 1/2"-13x1-1/2" Brass Socket Head Cap Screw SKU 14860 $55.44
Approved Vendor 1/2"-13x1-1/2" Low Socket Head Cap Screws Thermal Black Oxide SKU 14862 $3.95
Approved Vendor 1/2"-13x1-1/4" Brass Flat Head Socket Cap Screw SKU 14866 $12.55
Approved Vendor 1/2"-13x1-1/4" Brass Socket Head Cap Screw SKU 14867 $22.04
Approved Vendor 1/2"-13x1-3/4" Low Socket Head Cap Screws Thermal Black Oxide SKU 14872 $4.21
Approved Vendor 1/2"-13x2" Brass Flat Head Socket Cap Screw SKU 14884 $19.56
Approved Vendor 1/2"-13x2" Brass Socket Head Cap Screw SKU 14885 $25.10
Approved Vendor 1/2"-13x2" Low Socket Head Cap Screws Thermal Black Oxide SKU 14887 $5.77
Approved Vendor 1/2"-13x2-1/2" Brass Flat Head Socket Cap Screw SKU 14891 $26.00
Approved Vendor 1/2"-13x2-1/2" Brass Socket Head Cap Screw SKU 14892 $54.52
Approved Vendor 1/2"-13x2-1/2" Low Socket Head Cap Screws Thermal Black Oxide SKU 14894 $15.65
Approved Vendor 1/2"-13x2-3/4" Brass Flat Head Socket Cap Screw SKU 14901 $33.41

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