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 13

Approved Vendor 1/2-13x6" Alloy Socket Head Cap Screws Black Oxide SKU 15425 $6.37
Approved Vendor 1/2-13x7/16" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15437 $0.54
Approved Vendor 1/2-13x7/8" Alloy Cup Point Allen Socket Set Screw Black Oxide SKU 15438 $0.93
Approved Vendor 1/2-13x7/8" Stainless Steel Cup Point Allen Socket Set Screw SKU 959 $1.84
Approved Vendor 1/2-20x1" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2746 $3.26
Approved Vendor 1/2-20x1" Alloy Button Head Socket Cap Screws Black Oxide SKU 15447 $2.62
Approved Vendor 1/2-20x1" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15448 $1.61
Approved Vendor 1/2-20x1" Alloy Socket Head Cap Screws Black Oxide SKU 15449 $1.92
Approved Vendor 1/2-20x1-1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 15455 $3.66
Approved Vendor 1/2-20x1-1/2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15456 $2.03
Approved Vendor 1/2-20x1-1/2" Alloy Socket Head Cap Screws Black Oxide SKU 15457 $2.37
Approved Vendor 1/2-20x1-1/4" 18-8 Stainless Steel Flat Head Socket Cap Screws SKU 2747 $3.56
Approved Vendor 1/2-20x1-1/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 15463 $3.27
Approved Vendor 1/2-20x1-1/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15464 $1.92
Approved Vendor 1/2-20x1-1/4" Alloy Socket Head Cap Screws Black Oxide SKU 15465 $2.15
Approved Vendor 1/2-20x1-3/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 15471 $4.66
Approved Vendor 1/2-20x1-3/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15472 $2.26
Approved Vendor 1/2-20x1-3/4" Alloy Socket Head Cap Screws Black Oxide SKU 15473 $2.60
Approved Vendor 1/2-20x2" Alloy Button Head Socket Cap Screws Black Oxide SKU 15479 $4.64
Approved Vendor 1/2-20x2" Alloy Socket Head Cap Screws Black Oxide SKU 15480 $2.88
Approved Vendor 1/2-20x2-1/2" Alloy Button Head Socket Cap Screws Black Oxide SKU 15486 $5.66
Approved Vendor 1/2-20x2-1/2" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15487 $4.58
Approved Vendor 1/2-20x2-1/2" Alloy Socket Head Cap Screws Black Oxide SKU 15488 $3.41
Approved Vendor 1/2-20x2-1/4" Alloy Button Head Socket Cap Screws Black Oxide SKU 15494 $5.81
Approved Vendor 1/2-20x2-1/4" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15495 $4.16
Approved Vendor 1/2-20x2-1/4" Alloy Socket Head Cap Screws Black Oxide SKU 15496 $3.12
Approved Vendor 1/2-20x3" Alloy Button Head Socket Cap Screws Black Oxide SKU 15505 $6.59
Approved Vendor 1/2-20x3" Alloy Flat Head Socket Cap Screws Black Oxide SKU 15506 $5.43
Approved Vendor 1/2-20x3" Alloy Socket Head Cap Screws Black Oxide SKU 15507 $3.99
Approved Vendor 1/4" x 1" x #10-24 Allen Socket Stainless Steel Shoulder Bolts SKU 1710 $5.14
Approved Vendor 1/4" x 1" x #10-24 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 16134 $2.05
Approved Vendor 1/4" x 1" x #10-32 Allen Socket Stainless Steel Shoulder Bolts SKU 1711 $5.98
Approved Vendor 1/4" x 1" x #10-32 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 16135 $2.88
Approved Vendor 1/4" x 1-1/2" x #10-24 Allen Socket Stainless Steel Shoulder Bolts SKU 1714 $6.32
Approved Vendor 1/4" x 1-1/2" x #10-24 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 16137 $2.52
Approved Vendor 1/4" x 1-1/4" x #10-24 Allen Socket Stainless Steel Shoulder Bolts SKU 1712 $5.62
Approved Vendor 1/4" x 1-1/4" x #10-24 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 16138 $2.12
Approved Vendor 1/4" x 1-1/4" x #10-32 Allen Socket Stainless Steel Shoulder Bolts SKU 1713 $6.39
Approved Vendor 1/4" x 1-3/4" x #10-24 Allen Socket Stainless Steel Shoulder Bolts SKU 1715 $8.05
Approved Vendor 1/4" x 1-3/4" x #10-24 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 16139 $3.39
Approved Vendor 1/4" x 1/2" x #10-24 Allen Socket Stainless Steel Shoulder Bolts SKU 1704 $4.07
Approved Vendor 1/4" x 1/2" x #10-24 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 16141 $1.84
Approved Vendor 1/4" x 1/2" x #10-32 Allen Socket Stainless Steel Shoulder Bolts SKU 1705 $4.62
Approved Vendor 1/4" x 1/2" x #10-32 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 16142 $2.59
Approved Vendor 1/4" x 1/4" x #10-24 Allen Socket Stainless Steel Shoulder Bolts SKU 1698 $3.47
Approved Vendor 1/4" x 1/4" x #10-32 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 16145 $2.40
Approved Vendor 1/4" x 2" x #10-24 Allen Socket Stainless Steel Shoulder Bolts SKU 1716 $9.15
Approved Vendor 1/4" x 2" x #10-24 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 16160 $3.60

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