Hex Bolts & Cap Screws

2,000+ products

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 6

Approved Vendor 1/2-13x6 Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15422 $5.42
Approved Vendor 1/2-13x6" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15428 $3.81
Approved Vendor 1/2-13x6" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 15429 $4.36
Approved Vendor 1/2-13x6" Stainless Steel Hex Cap Screws Bolts SKU 1205 $7.17
Approved Vendor 1/2-13x6-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15431 $4.61
Approved Vendor 1/2-13x7 Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15432 $7.94
Approved Vendor 1/2-13x7" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15433 $5.07
Approved Vendor 1/2-13x7" Stainless Steel Hex Cap Screws Bolts SKU 1206 $8.86
Approved Vendor 1/2-13x7-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15436 $5.53
Approved Vendor 1/2-13x7/8" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 15439 $1.74
Approved Vendor 1/2-13x7/8" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15440 $1.06
Approved Vendor 1/2-13x8 Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15441 $9.32
Approved Vendor 1/2-13x8" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15442 $7.25
Approved Vendor 1/2-13x8" Stainless Steel Hex Cap Screws Bolts SKU 1207 $9.93
Approved Vendor 1/2-13x9 Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15445 $13.21
Approved Vendor 1/2-20x1" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15450 $3.24
Approved Vendor 1/2-20x1" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15451 $1.26
Approved Vendor 1/2-20x1" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15452 $1.92
Approved Vendor 1/2-20x1" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15453 $1.66
Approved Vendor 1/2-20x1" Stainless Steel Hex Cap Screws Bolts SKU 1357 $2.46
Approved Vendor 1/2-20x1-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15458 $3.15
Approved Vendor 1/2-20x1-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15459 $1.42
Approved Vendor 1/2-20x1-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15460 $2.41
Approved Vendor 1/2-20x1-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15461 $2.00
Approved Vendor 1/2-20x1-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1359 $3.01
Approved Vendor 1/2-20x1-1/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15466 $3.43
Approved Vendor 1/2-20x1-1/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15467 $1.36
Approved Vendor 1/2-20x1-1/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15468 $2.06
Approved Vendor 1/2-20x1-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15469 $1.83
Approved Vendor 1/2-20x1-1/4" Stainless Steel Hex Cap Screws Bolts SKU 1358 $2.72
Approved Vendor 1/2-20x1-3/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15474 $4.06
Approved Vendor 1/2-20x1-3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15475 $1.75
Approved Vendor 1/2-20x1-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15476 $2.63
Approved Vendor 1/2-20x1-3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15477 $2.37
Approved Vendor 1/2-20x1-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1360 $3.34
Approved Vendor 1/2-20x2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15481 $3.99
Approved Vendor 1/2-20x2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15482 $1.77
Approved Vendor 1/2-20x2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15483 $2.91
Approved Vendor 1/2-20x2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15484 $2.50
Approved Vendor 1/2-20x2" Stainless Steel Hex Cap Screws Bolts SKU 1361 $3.76
Approved Vendor 1/2-20x2-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15489 $5.16
Approved Vendor 1/2-20x2-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15490 $2.29
Approved Vendor 1/2-20x2-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15491 $3.44
Approved Vendor 1/2-20x2-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15492 $3.09
Approved Vendor 1/2-20x2-1/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15497 $4.80
Approved Vendor 1/2-20x2-1/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15498 $2.03
Approved Vendor 1/2-20x2-1/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15499 $3.19
Approved Vendor 1/2-20x2-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15500 $2.86

More in Fasteners