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 12

Approved Vendor 1/2-13x2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15257 $1.76
Approved Vendor 1/2-13x2" Alloy Socket Head Cap Screws Black Oxide SKU 15258 $1.70
Approved Vendor 1/2-13x2" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15259 $3.31
Approved Vendor 1/2-13x2'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2600 $2.85
Approved Vendor 1/2-13x2'' 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 15272 $33.70
Approved Vendor 1/2-13x2-1/2" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2707 $2.98
Approved Vendor 1/2-13x2-1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 15274 $4.26
Approved Vendor 1/2-13x2-1/2" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15275 $3.07
Approved Vendor 1/2-13x2-1/2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15276 $2.63
Approved Vendor 1/2-13x2-1/2" Alloy Socket Head Cap Screws Black Oxide SKU 15277 $2.09
Approved Vendor 1/2-13x2-1/2" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15278 $3.95
Approved Vendor 1/2-13x2-1/2'' 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2601 $3.48
Approved Vendor 1/2-13x2-1/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 15291 $4.45
Approved Vendor 1/2-13x2-1/4" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15292 $4.32
Approved Vendor 1/2-13x2-1/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15293 $2.31
Approved Vendor 1/2-13x2-1/4" Alloy Socket Head Cap Screws Black Oxide SKU 15294 $2.14
Approved Vendor 1/2-13x2-1/4" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15295 $4.02
Approved Vendor 1/2-13x2-3/4" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15306 $4.56
Approved Vendor 1/2-13x3" 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2602 $3.83
Approved Vendor 1/2-13x3" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2708 $3.49
Approved Vendor 1/2-13x3" Alloy Button Head Socket Cap Screws Black Oxide SKU 15317 $5.01
Approved Vendor 1/2-13x3" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15318 $3.08
Approved Vendor 1/2-13x3" Alloy Socket Head Cap Screws Black Oxide SKU 15319 $2.46
Approved Vendor 1/2-13x3" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15320 $4.52
Approved Vendor 1/2-13x3-1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 15334 $6.35
Approved Vendor 1/2-13x3-1/2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15335 $5.59
Approved Vendor 1/2-13x3-1/2" Alloy Socket Head Cap Screws Black Oxide SKU 15336 $3.17
Approved Vendor 1/2-13x3-1/2" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15337 $5.68
Approved Vendor 1/2-13x3/4" 18-8 Stainless Steel Button Head Socket Cap Screws SKU 2596 $1.53
Approved Vendor 1/2-13x3/4" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2702 $1.51
Approved Vendor 1/2-13x3/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 15356 $1.80
Approved Vendor 1/2-13x3/4" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15358 $0.80
Approved Vendor 1/2-13x3/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15359 $0.97
Approved Vendor 1/2-13x3/4" Alloy Socket Head Cap Screws Black Oxide SKU 15360 $1.12
Approved Vendor 1/2-13x3/4" Alloy Socket Head Cap Screws Zinc Clear SKU 15361 $1.47
Approved Vendor 1/2-13x3/4" Stainless Steel Cup Point Allen Socket Set Screw SKU 958 $1.47
Approved Vendor 1/2-13x3/4'' 18-8 Stainless Steel Socket Head Cap Screws USA Made SKU 15369 $20.58
Approved Vendor 1/2-13x3/8" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15370 $0.57
Approved Vendor 1/2-13x4" Alloy Button Head Socket Cap Screws Black Oxide SKU 15371 $7.18
Approved Vendor 1/2-13x4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15372 $6.54
Approved Vendor 1/2-13x4" Alloy Socket Head Cap Screws Black Oxide SKU 15373 $3.56
Approved Vendor 1/2-13x4" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15374 $7.16
Approved Vendor 1/2-13x4-1/2" Alloy Socket Head Cap Screws Black Oxide USA Made SKU 15384 $18.05
Approved Vendor 1/2-13x5" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15400 $7.99
Approved Vendor 1/2-13x5" Alloy Socket Head Cap Screws Black Oxide SKU 15401 $4.75
Approved Vendor 1/2-13x5/8" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15420 $0.67
Approved Vendor 1/2-13x5/8" Stainless Steel Cup Point Allen Socket Set Screw SKU 957 $1.08
Approved Vendor 1/2-13x6" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15424 $13.44

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