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 24

Approved Vendor 3/8-16x3" Alloy Socket Head Cap Screws Zinc Clear SKU 23061 $2.78
Approved Vendor 3/8-16x3'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2595 $3.23
Approved Vendor 3/8-16x3-1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 23074 $3.47
Approved Vendor 3/8-16x3-1/2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 23075 $3.16
Approved Vendor 3/8-16x3-1/2" Alloy Socket Head Cap Screws Black Oxide SKU 23076 $1.92
Approved Vendor 3/8-16x3-1/2" Alloy Socket Head Cap Screws Zinc Clear SKU 23077 $3.26
Approved Vendor 3/8-16x3/4" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2693 $0.67
Approved Vendor 3/8-16x3/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 23095 $0.56
Approved Vendor 3/8-16x3/4" Alloy Button Head Socket Cap Screws Zinc Clear SKU 23096 $0.93
Approved Vendor 3/8-16x3/4" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 23097 $0.46
Approved Vendor 3/8-16x3/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 23098 $0.57
Approved Vendor 3/8-16x3/4" Alloy Knurled Cup Point Allen Socket Set Screw Black Oxide SKU 23101 $0.96
Approved Vendor 3/8-16x3/4" Alloy Socket Head Cap Screws Black Oxide SKU 23102 $0.53
Approved Vendor 3/8-16x3/4" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 23103 $1.29
Approved Vendor 3/8-16x3/4" Alloy Socket Head Cap Screws Zinc Clear SKU 23104 $1.01
Approved Vendor 3/8-16x3/4'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2586 $0.68
Approved Vendor 3/8-16x3/8" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 23120 $0.25
Approved Vendor 3/8-16x3/8" Alloy Knurled Cup Point Allen Socket Set Screw Black Oxide SKU 23122 $0.51
Approved Vendor 3/8-16x3/8" Stainless Steel Cup Point Allen Socket Set Screw SKU 941 $0.41
Approved Vendor 3/8-16x4" Alloy Button Head Socket Cap Screws Black Oxide SKU 23123 $3.80
Approved Vendor 3/8-16x4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 23124 $3.60
Approved Vendor 3/8-16x4" Alloy Socket Head Cap Screws Black Oxide SKU 23125 $2.15
Approved Vendor 3/8-16x4" Alloy Socket Head Cap Screws Zinc Clear SKU 23126 $3.68
Approved Vendor 3/8-16x4-1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 23134 $4.53
Approved Vendor 3/8-16x4-1/2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 23135 $4.63
Approved Vendor 3/8-16x4-1/2" Alloy Socket Head Cap Screws Black Oxide SKU 23136 $2.65
Approved Vendor 3/8-16x4-1/2" Alloy Socket Head Cap Screws Zinc Clear SKU 23137 $4.05
Approved Vendor 3/8-16x5" Alloy Button Head Socket Cap Screws Black Oxide SKU 23144 $4.96
Approved Vendor 3/8-16x5" Alloy Flat Head Socket Cap Screws Black Oxide SKU 23145 $5.14
Approved Vendor 3/8-16x5" Alloy Socket Head Cap Screws Black Oxide SKU 23146 $2.87
Approved Vendor 3/8-16x5" Alloy Socket Head Cap Screws Zinc Clear SKU 23147 $4.47
Approved Vendor 3/8-16x5/8" 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 23160 $8.02
Approved Vendor 3/8-16x5/8" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 23162 $0.37
Approved Vendor 3/8-16x5/8" Alloy Knurled Cup Point Allen Socket Set Screw Black Oxide SKU 23164 $0.75
Approved Vendor 3/8-16x6" Alloy Flat Head Socket Cap Screws Black Oxide SKU 23170 $6.25
Approved Vendor 3/8-16x6" Alloy Socket Head Cap Screws Black Oxide SKU 23171 $3.53
Approved Vendor 3/8-16x6" Alloy Socket Head Cap Screws Zinc Clear SKU 23172 $5.55
Approved Vendor 3/8-16x7/16" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 23183 $0.27
Approved Vendor 3/8-16x7/8" 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 23184 $8.64
Approved Vendor 3/8-16x7/8" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 23185 $0.59
Approved Vendor 3/8-16x7/8" Stainless Steel Cup Point Allen Socket Set Screw SKU 945 $0.85
Approved Vendor 3/8-24x1" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2744 $2.03
Approved Vendor 3/8-24x1" Alloy Button Head Socket Cap Screws Black Oxide SKU 23196 $0.86
Approved Vendor 3/8-24x1" Alloy Button Head Socket Cap Screws Zinc Clear SKU 23197 $1.17
Approved Vendor 3/8-24x1" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 23199 $0.74
Approved Vendor 3/8-24x1" Alloy Flat Head Socket Cap Screws Black Oxide SKU 23200 $0.84
Approved Vendor 3/8-24x1" Alloy Flat Head Socket Cap Screws Zinc Clear SKU 23201 $1.14
Approved Vendor 3/8-24x1" Alloy Knurled Cup Point Allen Socket Set Screw Black Oxide SKU 23203 $1.28

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