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 23

Approved Vendor 3/8-16x1/2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 22968 $0.69
Approved Vendor 3/8-16x1/2" Alloy Flat Head Socket Cap Screws Zinc Clear SKU 22969 $1.01
Approved Vendor 3/8-16x1/2" Alloy Knurled Cup Point Allen Socket Set Screw Black Oxide SKU 22971 $0.55
Approved Vendor 3/8-16x1/2" Alloy Socket Head Cap Screws Black Oxide SKU 22972 $0.46
Approved Vendor 3/8-16x1/2" Alloy Socket Head Cap Screws Zinc Clear SKU 22973 $0.86
Approved Vendor 3/8-16x1/2" Stainless Steel Cup Point Allen Socket Set Screw SKU 942 $0.44
Approved Vendor 3/8-16x1/2'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2585 $0.84
Approved Vendor 3/8-16x2" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2698 $1.33
Approved Vendor 3/8-16x2" 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 22982 $13.62
Approved Vendor 3/8-16x2" Alloy Button Head Socket Cap Screws Black Oxide SKU 22984 $1.83
Approved Vendor 3/8-16x2" Alloy Button Head Socket Cap Screws Zinc Clear SKU 22985 $1.95
Approved Vendor 3/8-16x2" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 22986 $1.41
Approved Vendor 3/8-16x2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 22987 $1.20
Approved Vendor 3/8-16x2" Alloy Flat Head Socket Cap Screws Zinc Clear SKU 22988 $1.88
Approved Vendor 3/8-16x2" Alloy Socket Head Cap Screws Black Oxide SKU 22989 $0.91
Approved Vendor 3/8-16x2" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 22990 $1.87
Approved Vendor 3/8-16x2" Alloy Socket Head Cap Screws Zinc Clear SKU 22991 $1.94
Approved Vendor 3/8-16x2'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2591 $1.67
Approved Vendor 3/8-16x2-1/2" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2700 $1.99
Approved Vendor 3/8-16x2-1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 23008 $2.28
Approved Vendor 3/8-16x2-1/2" Alloy Button Head Socket Cap Screws Zinc Clear SKU 23009 $2.05
Approved Vendor 3/8-16x2-1/2" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 23010 $2.10
Approved Vendor 3/8-16x2-1/2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 23011 $1.53
Approved Vendor 3/8-16x2-1/2" Alloy Flat Head Socket Cap Screws Zinc Clear SKU 23012 $2.36
Approved Vendor 3/8-16x2-1/2" Alloy Socket Head Cap Screws Black Oxide SKU 23013 $1.14
Approved Vendor 3/8-16x2-1/2" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 23014 $2.45
Approved Vendor 3/8-16x2-1/2" Alloy Socket Head Cap Screws Zinc Clear SKU 23015 $2.38
Approved Vendor 3/8-16x2-1/2'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2593 $1.91
Approved Vendor 3/8-16x2-1/4" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2699 $1.93
Approved Vendor 3/8-16x2-1/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 23026 $2.07
Approved Vendor 3/8-16x2-1/4" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 23027 $2.11
Approved Vendor 3/8-16x2-1/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 23028 $1.41
Approved Vendor 3/8-16x2-1/4" Alloy Flat Head Socket Cap Screws Zinc Clear SKU 23029 $2.20
Approved Vendor 3/8-16x2-1/4" Alloy Socket Head Cap Screws Black Oxide SKU 23030 $1.05
Approved Vendor 3/8-16x2-1/4" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 23031 $2.29
Approved Vendor 3/8-16x2-1/4" Alloy Socket Head Cap Screws Zinc Clear SKU 23032 $2.20
Approved Vendor 3/8-16x2-1/4'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2592 $1.79
Approved Vendor 3/8-16x2-3/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 23042 $2.39
Approved Vendor 3/8-16x2-3/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 23043 $2.53
Approved Vendor 3/8-16x2-3/4" Alloy Socket Head Cap Screws Black Oxide SKU 23044 $1.41
Approved Vendor 3/8-16x2-3/4" Alloy Socket Head Cap Screws Zinc Clear SKU 23045 $2.60
Approved Vendor 3/8-16x2-3/4'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2594 $2.86
Approved Vendor 3/8-16x3" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2701 $2.37
Approved Vendor 3/8-16x3" Alloy Button Head Socket Cap Screws Black Oxide SKU 23056 $2.67
Approved Vendor 3/8-16x3" Alloy Flat Head Socket Cap Screws Black Oxide SKU 23057 $1.86
Approved Vendor 3/8-16x3" Alloy Flat Head Socket Cap Screws Zinc Clear SKU 23058 $2.86
Approved Vendor 3/8-16x3" Alloy Socket Head Cap Screws Black Oxide SKU 23059 $1.31
Approved Vendor 3/8-16x3" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 23060 $2.72

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