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 39

Approved Vendor M5-0.8x30 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3132500 $347.85
Approved Vendor M5-0.8x30 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 634 $0.39
Approved Vendor M5-0.8x35 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4952500 $390.86
Approved Vendor M5-0.8x35 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3142500 $335.57
Approved Vendor M5-0.8x35 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 635 $0.44
Approved Vendor M5-0.8x40 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4962000 $348.18
Approved Vendor M5-0.8x40 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3152500 $392.95
Approved Vendor M5-0.8x40 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 636 $0.29
Approved Vendor M5-0.8x40 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 637 $0.50
Approved Vendor M5-0.8x40 Class 45H Cup Point Allen Socket Set Screws Black Oxide SKU 28869 $1.41
Approved Vendor M5-0.8x45 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 638 $0.32
Approved Vendor M5-0.8x50 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4971500 $332.87
Approved Vendor M5-0.8x50 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3162500 $924.35
Approved Vendor M5-0.8x50 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 639 $0.58
Approved Vendor M5-0.8x6 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4782500 $217.64
Approved Vendor M5-0.8x6 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 4792500 $214.40
Approved Vendor M5-0.8x6 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 618 $0.24
Approved Vendor M5-0.8x60 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3172500 $1,126.71
Approved Vendor M5-0.8x60 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 640 $0.70
Approved Vendor M5-0.8x8 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 4802500 $219.38
Approved Vendor M5-0.8x8 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 4812500 $219.61
Approved Vendor M5-0.8x8 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3002500 $171.46
Approved Vendor M5-0.8x8 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3012500 $193.80
Approved Vendor M5-0.8x8 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 619 $0.25
Approved Vendor M5-1.5x15 Class 12.9 Alloy Socket Head Cap Screws Zinc Plated SKU 626 $0.23
Approved Vendor M6 x 10MM x M5-0.8 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26280 $2.89
Approved Vendor M6 x 10MM x M5-0.8 Allen Socket Stainless Steel Shoulder Bolts SKU 1800 $11.13
Approved Vendor M6 x 12MM x M5-0.8 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26281 $3.08
Approved Vendor M6 x 12MM x M5-0.8 Allen Socket Stainless Steel Shoulder Bolts SKU 1801 $11.40
Approved Vendor M6 x 16MM x M5-0.8 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26282 $3.31
Approved Vendor M6 x 16MM x M5-0.8 Allen Socket Stainless Steel Shoulder Bolts SKU 1802 $11.89
Approved Vendor M6 x 20MM x M5-0.8 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26283 $3.49
Approved Vendor M6 x 20MM x M5-0.8 Allen Socket Stainless Steel Shoulder Bolts SKU 1803 $12.48
Approved Vendor M6 x 25MM x M5-0.8 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26284 $3.62
Approved Vendor M6 x 25MM x M5-0.8 Allen Socket Stainless Steel Shoulder Bolts SKU 1805 $13.84
Approved Vendor M6 x 30MM x M5-0.8 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26285 $3.76
Approved Vendor M6 x 30MM x M5-0.8 Allen Socket Stainless Steel Shoulder Bolts SKU 1804 $14.81
Approved Vendor M6 x 40MM x M5-0.8 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26286 $3.97
Approved Vendor M6 x 50MM x M5-0.8 Allen Socket Alloy Shoulder Bolts Black Oxide SKU 26287 $4.80
Approved Vendor M6 x 6MM x M5-0.8 Allen Socket Stainless Steel Shoulder Bolts SKU 1798 $10.82
Approved Vendor M6-1.00x25 Class 10.9 Low Socket Head Cap Screws Thermal Black Oxide SKU 28891 $0.55
Approved Vendor M6-1.0x10 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 5002500 $179.54
Approved Vendor M6-1.0x10 Class 12.9 Alloy Button Socket Head Cap Screws Zinc SKU 501 $0.23
Approved Vendor M6-1.0x10 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 3192500 $205.78
Approved Vendor M6-1.0x10 Class 12.9 Alloy Flat Socket Head Cap Screws Zinc SKU 3202500 $245.01
Approved Vendor M6-1.0x10 Class 12.9 Alloy Socket Head Cap Screws Black Oxide SKU 794 $0.18
Approved Vendor M6-1.0x100 Class 12.9 Alloy Flat Socket Head Cap Screws Black Oxide SKU 343500 $272.39
Approved Vendor M6-1.0x12 Class 12.9 Alloy Button Socket Head Cap Screws Black Oxide SKU 502 $0.21

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