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 28

Approved Vendor 5/8" x 3/4" x 1/2-13" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 25715 $9.29
Approved Vendor 5/8" x 4" x 1/2"-13 Allen Socket Stainless Steel Shoulder Bolts SKU 1780 $71.34
Approved Vendor 5/8" x 4" x 1/2-13" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 25720 $19.51
Approved Vendor 5/8" x 5" x 1/2"-13 Allen Socket Stainless Steel Shoulder Bolts SKU 1781 $89.29
Approved Vendor 5/8" x 5" x 1/2-13" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 25723 $29.15
Approved Vendor 5/8" x 5/8" x 1/2"-13 Allen Socket Stainless Steel Shoulder Bolts SKU 1768 $29.17
Approved Vendor 5/8" x 5/8" x 1/2-13" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 25742 $8.39
Approved Vendor 5/8" x 6" x 1/2"-13 Allen Socket Stainless Steel Shoulder Bolts SKU 1782 $107.31
Approved Vendor 5/8" x 6" x 1/2-13" Allen Socket Alloy Shoulder Bolts Black Oxide SKU 25748 $36.42
Approved Vendor 5/8"-11x1-1/2" Low Socket Head Cap Screws Thermal Black Oxide SKU 25854 $6.42
Approved Vendor 5/8"-11x1-1/4" Low Socket Head Cap Screws Thermal Black Oxide SKU 25857 $19.98
Approved Vendor 5/8"-11x1-3/4" Low Socket Head Cap Screws Thermal Black Oxide SKU 25861 $7.06
Approved Vendor 5/8"-11x2" Low Socket Head Cap Screws Thermal Black Oxide SKU 25871 $7.99
Approved Vendor 5/8"-11x2-1/4" Low Socket Head Cap Screws Thermal Black Oxide SKU 25878 $8.35
Approved Vendor 5/8-11x1" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2709 $6.68
Approved Vendor 5/8-11x1" Alloy Button Head Socket Cap Screws Black Oxide SKU 26072 $2.95
Approved Vendor 5/8-11x1" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 26074 $1.86
Approved Vendor 5/8-11x1" Alloy Flat Head Socket Cap Screws Black Oxide SKU 26075 $3.44
Approved Vendor 5/8-11x1" Alloy Socket Head Cap Screws Black Oxide SKU 26076 $2.42
Approved Vendor 5/8-11x1" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 26077 $6.26
Approved Vendor 5/8-11x1" Stainless Steel Cup Point Allen Socket Set Screw SKU 968 $3.67
Approved Vendor 5/8-11x1-1/2" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2711 $6.82
Approved Vendor 5/8-11x1-1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 26082 $3.80
Approved Vendor 5/8-11x1-1/2" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 26084 $2.88
Approved Vendor 5/8-11x1-1/2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 26085 $2.77
Approved Vendor 5/8-11x1-1/2" Alloy Socket Head Cap Screws Black Oxide SKU 26086 $2.72
Approved Vendor 5/8-11x1-1/2" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 26087 $5.60
Approved Vendor 5/8-11x1-1/4" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2710 $6.04
Approved Vendor 5/8-11x1-1/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 26096 $3.35
Approved Vendor 5/8-11x1-1/4" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 26098 $2.36
Approved Vendor 5/8-11x1-1/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 26099 $2.46
Approved Vendor 5/8-11x1-1/4" Alloy Socket Head Cap Screws Black Oxide SKU 26100 $2.58
Approved Vendor 5/8-11x1-1/4" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 26101 $5.88
Approved Vendor 5/8-11x1-3/4" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2712 $8.01
Approved Vendor 5/8-11x1-3/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 26107 $5.81
Approved Vendor 5/8-11x1-3/4" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 26109 $3.46
Approved Vendor 5/8-11x1-3/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 26110 $3.15
Approved Vendor 5/8-11x1-3/4" Alloy Socket Head Cap Screws Black Oxide SKU 26111 $2.95
Approved Vendor 5/8-11x1-3/4" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 26112 $6.17
Approved Vendor 5/8-11x1-3/4" Stainless Steel Cup Point Allen Socket Set Screw SKU 970 $5.46
Approved Vendor 5/8-11x1/2" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 26119 $1.34
Approved Vendor 5/8-11x2" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2713 $8.58
Approved Vendor 5/8-11x2" Alloy Button Head Socket Cap Screws Black Oxide SKU 26128 $4.74
Approved Vendor 5/8-11x2" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 26130 $3.95
Approved Vendor 5/8-11x2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 26131 $2.89
Approved Vendor 5/8-11x2" Alloy Socket Head Cap Screws Black Oxide SKU 26132 $3.16
Approved Vendor 5/8-11x2" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 26133 $6.28
Approved Vendor 5/8-11x2" Stainless Steel Cup Point Allen Socket Set Screw SKU 971 $6.14

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