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 22

Approved Vendor 3/8-16x1" Alloy Socket Head Cap Screws Black Oxide SKU 22858 $0.56
Approved Vendor 3/8-16x1" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 22859 $1.29
Approved Vendor 3/8-16x1" Alloy Socket Head Cap Screws Zinc Clear SKU 22860 $1.20
Approved Vendor 3/8-16x1" Stainless Steel Cup Point Allen Socket Set Screw SKU 946 $0.98
Approved Vendor 3/8-16x1'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2587 $0.82
Approved Vendor 3/8-16x1-1/2" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2696 $1.07
Approved Vendor 3/8-16x1-1/2" 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 22878 $10.99
Approved Vendor 3/8-16x1-1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 22880 $1.51
Approved Vendor 3/8-16x1-1/2" Alloy Button Head Socket Cap Screws Zinc Clear SKU 22881 $1.39
Approved Vendor 3/8-16x1-1/2" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 22883 $1.04
Approved Vendor 3/8-16x1-1/2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 22884 $0.87
Approved Vendor 3/8-16x1-1/2" Alloy Flat Head Socket Cap Screws Zinc Clear SKU 22885 $1.45
Approved Vendor 3/8-16x1-1/2" Alloy Knurled Cup Point Allen Socket Set Screw Black Oxide SKU 22887 $1.89
Approved Vendor 3/8-16x1-1/2" Alloy Socket Head Cap Screws Black Oxide SKU 22888 $0.72
Approved Vendor 3/8-16x1-1/2" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 22889 $1.54
Approved Vendor 3/8-16x1-1/2" Alloy Socket Head Cap Screws Zinc Clear SKU 22890 $1.54
Approved Vendor 3/8-16x1-1/2" Stainless Steel Cup Point Allen Socket Set Screw SKU 948 $1.51
Approved Vendor 3/8-16x1-1/2'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2589 $1.12
Approved Vendor 3/8-16x1-1/4" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2695 $0.97
Approved Vendor 3/8-16x1-1/4" 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 22911 $9.89
Approved Vendor 3/8-16x1-1/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 22913 $0.85
Approved Vendor 3/8-16x1-1/4" Alloy Button Head Socket Cap Screws Zinc Clear SKU 22914 $1.32
Approved Vendor 3/8-16x1-1/4" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 22916 $0.82
Approved Vendor 3/8-16x1-1/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 22917 $0.75
Approved Vendor 3/8-16x1-1/4" Alloy Flat Head Socket Cap Screws Zinc Clear SKU 22918 $1.28
Approved Vendor 3/8-16x1-1/4" Alloy Knurled Cup Point Allen Socket Set Screw Black Oxide SKU 22920 $1.73
Approved Vendor 3/8-16x1-1/4" Alloy Socket Head Cap Screws Black Oxide SKU 22921 $0.62
Approved Vendor 3/8-16x1-1/4" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 22922 $1.41
Approved Vendor 3/8-16x1-1/4" Alloy Socket Head Cap Screws Zinc Clear SKU 22923 $1.35
Approved Vendor 3/8-16x1-1/4" Stainless Steel Cup Point Allen Socket Set Screw SKU 947 $1.20
Approved Vendor 3/8-16x1-1/4'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2588 $0.98
Approved Vendor 3/8-16x1-3/4" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2697 $1.19
Approved Vendor 3/8-16x1-3/4" 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 22940 $13.62
Approved Vendor 3/8-16x1-3/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 22942 $1.65
Approved Vendor 3/8-16x1-3/4" Alloy Button Head Socket Cap Screws Zinc Clear SKU 22943 $1.63
Approved Vendor 3/8-16x1-3/4" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 22944 $1.20
Approved Vendor 3/8-16x1-3/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 22945 $1.00
Approved Vendor 3/8-16x1-3/4" Alloy Flat Head Socket Cap Screws Zinc Clear SKU 22946 $1.68
Approved Vendor 3/8-16x1-3/4" Alloy Socket Head Cap Screws Black Oxide SKU 22947 $0.82
Approved Vendor 3/8-16x1-3/4" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 22948 $1.90
Approved Vendor 3/8-16x1-3/4" Alloy Socket Head Cap Screws Zinc Clear SKU 22949 $1.73
Approved Vendor 3/8-16x1-3/4" Stainless Steel Cup Point Allen Socket Set Screw SKU 949 $1.75
Approved Vendor 3/8-16x1-3/4'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2590 $1.61
Approved Vendor 3/8-16x1/2" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2692 $0.90
Approved Vendor 3/8-16x1/2" 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 22963 $6.36
Approved Vendor 3/8-16x1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 22964 $0.67
Approved Vendor 3/8-16x1/2" Alloy Button Head Socket Cap Screws Zinc Clear SKU 22965 $1.00
Approved Vendor 3/8-16x1/2" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 22967 $0.29

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