Hex Bolts & Cap Screws

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Expected delivery: Wed, Nov 18

Hex bolts and hex cap screws are the workhorse fasteners for machinery, structural brackets, truck bodies and equipment repair. This section covers inch sizes in UNC and UNF threads and metric sizes in class 8.8 and 10.9, with partial or full threads. Materials include Grade 2, Grade 5 and Grade 8 steel plus 18-8 and 316 stainless, in plain, zinc, yellow zinc and hot-dip galvanized finishes.

What to check before you order

Grade or property class. Match the grade to the load. Grade 5 covers most equipment work, and Grade 8 is for high-stress joints such as suspension and heavy machinery. The hex bolt grades guide shows head markings.
Thread pitch. A 1/2" bolt comes in 1/2"-13 coarse and 1/2"-20 fine. They will not interchange, so confirm the nut or tapped hole first.
Length and thread length. Measure from under the head. Longer bolts are often partially threaded, which leaves a smooth shank in the shear plane.
Finish. Hot-dip galvanized bolts need galvanized nuts, because the coating adds thickness to the threads.

Common questions

Is a Grade 8 bolt always the safer choice?

Not always. Grade 8 is stronger but less ductile than Grade 5. Use the grade the equipment maker or engineer specifies.

Pair your bolts with matching nuts and washers, or browse all fasteners.

Hex Bolts & Cap Screws: page 7

Approved Vendor 1/2-20x2-1/4" Stainless Steel Hex Cap Screws Bolts SKU 1362 $4.08
Approved Vendor 1/2-20x2-3/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15501 $3.74
Approved Vendor 1/2-20x2-3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15502 $2.39
Approved Vendor 1/2-20x2-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15503 $3.93
Approved Vendor 1/2-20x2-3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15504 $3.38
Approved Vendor 1/2-20x2-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1363 $4.92
Approved Vendor 1/2-20x3" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15508 $6.04
Approved Vendor 1/2-20x3" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15509 $2.56
Approved Vendor 1/2-20x3" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15510 $4.02
Approved Vendor 1/2-20x3" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15511 $3.46
Approved Vendor 1/2-20x3" Stainless Steel Hex Cap Screws Bolts SKU 1364 $5.24
Approved Vendor 1/2-20x3-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15513 $2.98
Approved Vendor 1/2-20x3-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15514 $4.65
Approved Vendor 1/2-20x3-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15515 $4.22
Approved Vendor 1/2-20x3-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1365 $5.89
Approved Vendor 1/2-20x3-1/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15516 $2.75
Approved Vendor 1/2-20x3-1/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15517 $4.58
Approved Vendor 1/2-20x3-3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15518 $3.13
Approved Vendor 1/2-20x3-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15519 $5.14
Approved Vendor 1/2-20x3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15520 $1.20
Approved Vendor 1/2-20x3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15521 $1.65
Approved Vendor 1/2-20x3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15522 $1.57
Approved Vendor 1/2-20x4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15523 $7.69
Approved Vendor 1/2-20x4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15524 $3.30
Approved Vendor 1/2-20x4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15525 $5.17
Approved Vendor 1/2-20x4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15526 $4.76
Approved Vendor 1/2-20x4" Stainless Steel Hex Cap Screws Bolts SKU 1366 $6.55
Approved Vendor 1/2-20x4-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15527 $3.71
Approved Vendor 1/2-20x4-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15528 $6.15
Approved Vendor 1/2-20x4-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15529 $5.33
Approved Vendor 1/2-20x4-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1367 $7.38
Approved Vendor 1/2-20x5" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15530 $5.55
Approved Vendor 1/2-20x5" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15531 $4.07
Approved Vendor 1/2-20x5" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15532 $7.01
Approved Vendor 1/2-20x5" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15533 $5.83
Approved Vendor 1/2-20x5" Stainless Steel Hex Cap Screws Bolts SKU 1368 $8.03
Approved Vendor 1/2-20x5-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15534 $4.61
Approved Vendor 1/2-20x5-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15535 $7.73
Approved Vendor 1/2-20x5-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15536 $6.44
Approved Vendor 1/2-20x5-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1369 $8.69
Approved Vendor 1/2-20x6" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15538 $4.93
Approved Vendor 1/2-20x6" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15539 $8.30
Approved Vendor 1/2-20x6" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15540 $6.91
Approved Vendor 1/2-20x7" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15541 $8.52
Approved Vendor 1/2-20x7" Stainless Steel Hex Cap Screws Bolts SKU 1371 $11.27
Approved Vendor 1/2-20x7/8" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15542 $1.19
Approved Vendor 1/2-20x7/8" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15543 $1.56
Approved Vendor 1/2-20x8" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15544 $11.13

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