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 11

Approved Vendor 1/2"-13x3" Brass Flat Head Socket Cap Screw SKU 14905 $37.61
Approved Vendor 1/2"-13x3" Brass Socket Head Cap Screw SKU 14906 $67.87
Approved Vendor 1/2"-13x3" Low Socket Head Cap Screws Thermal Black Oxide SKU 14908 $4.78
Approved Vendor 1/2"-13x3-1/2" Brass Flat Head Socket Cap Screw SKU 14912 $43.53
Approved Vendor 1/2"-13x3/4" Low Socket Head Cap Screws Thermal Black Oxide SKU 14919 $2.87
Approved Vendor 1/2"-13x4" Brass Flat Head Socket Cap Screw SKU 14923 $47.98
Approved Vendor 1/2"-20x1 1/4" Low Socket Head Cap Screws Thermal Black Oxide SKU 15037 $3.98
Approved Vendor 1/2"-20x1" Low Socket Head Cap Screws Thermal Black Oxide SKU 15042 $3.60
Approved Vendor 1/2"-20x1-1/2" Low Socket Head Cap Screws Thermal Black Oxide SKU 15044 $4.50
Approved Vendor 1/2-13x1" 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2597 $1.74
Approved Vendor 1/2-13x1" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2703 $1.35
Approved Vendor 1/2-13x1" Alloy Button Head Socket Cap Screws Black Oxide SKU 15166 $1.38
Approved Vendor 1/2-13x1" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15168 $1.11
Approved Vendor 1/2-13x1" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15169 $1.17
Approved Vendor 1/2-13x1" Alloy Socket Head Cap Screws Black Oxide SKU 15170 $1.24
Approved Vendor 1/2-13x1" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15171 $2.45
Approved Vendor 1/2-13x1" Alloy Socket Head Cap Screws Zinc Clear SKU 15172 $1.64
Approved Vendor 1/2-13x1" Stainless Steel Cup Point Allen Socket Set Screw SKU 960 $1.96
Approved Vendor 1/2-13x1'' 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 15183 $18.50
Approved Vendor 1/2-13x1-1/2" 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2598 $2.22
Approved Vendor 1/2-13x1-1/2" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2704 $1.78
Approved Vendor 1/2-13x1-1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 15186 $1.85
Approved Vendor 1/2-13x1-1/2" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15188 $1.74
Approved Vendor 1/2-13x1-1/2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15189 $1.36
Approved Vendor 1/2-13x1-1/2" Alloy Socket Head Cap Screws Black Oxide SKU 15190 $1.41
Approved Vendor 1/2-13x1-1/2" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15191 $2.86
Approved Vendor 1/2-13x1-1/2" Alloy Socket Head Cap Screws Zinc Clear SKU 15192 $1.92
Approved Vendor 1/2-13x1-1/2'' 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 15205 $22.37
Approved Vendor 1/2-13x1-1/4" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15207 $1.41
Approved Vendor 1/2-13x1-1/4" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15208 $2.65
Approved Vendor 1/2-13x1-1/4" Stainless Steel Cup Point Allen Socket Set Screw SKU 961 $2.73
Approved Vendor 1/2-13x1-1/4'' 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 15222 $21.27
Approved Vendor 1/2-13x1-3/4" 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2599 $2.68
Approved Vendor 1/2-13x1-3/4" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2705 $2.14
Approved Vendor 1/2-13x1-3/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 15224 $3.20
Approved Vendor 1/2-13x1-3/4" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15226 $2.05
Approved Vendor 1/2-13x1-3/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15227 $1.83
Approved Vendor 1/2-13x1-3/4" Alloy Socket Head Cap Screws Black Oxide SKU 15228 $1.55
Approved Vendor 1/2-13x1-3/4" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15229 $3.14
Approved Vendor 1/2-13x1-3/4" Alloy Socket Head Cap Screws Zinc Clear SKU 15230 $4.35
Approved Vendor 1/2-13x1-3/4'' 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 15241 $29.55
Approved Vendor 1/2-13x1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 15242 $2.15
Approved Vendor 1/2-13x1/2" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15244 $0.61
Approved Vendor 1/2-13x1/2" Alloy Socket Head Cap Screws Black Oxide SKU 15245 $1.76
Approved Vendor 1/2-13x1/2" Stainless Steel Cup Point Allen Socket Set Screw SKU 956 $0.99
Approved Vendor 1/2-13x2" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2706 $2.41
Approved Vendor 1/2-13x2" Alloy Button Head Socket Cap Screws Black Oxide SKU 15254 $2.36
Approved Vendor 1/2-13x2" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15256 $2.33

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