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 5

Approved Vendor 1/2-13x3-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15339 $5.76
Approved Vendor 1/2-13x3-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15341 $2.20
Approved Vendor 1/2-13x3-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15342 $4.20
Approved Vendor 1/2-13x3-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15343 $3.02
Approved Vendor 1/2-13x3-1/2" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 15344 $2.61
Approved Vendor 1/2-13x3-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1200 $4.08
Approved Vendor 1/2-13x3-1/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15346 $5.47
Approved Vendor 1/2-13x3-1/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15347 $2.09
Approved Vendor 1/2-13x3-1/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15348 $4.22
Approved Vendor 1/2-13x3-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15349 $3.48
Approved Vendor 1/2-13x3-3/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15351 $6.04
Approved Vendor 1/2-13x3-3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15352 $2.46
Approved Vendor 1/2-13x3-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15353 $4.73
Approved Vendor 1/2-13x3/4" Brass Hex Tap Bolts Full Thread SKU 15362 $8.86
Approved Vendor 1/2-13x3/4" Grade 5 Hex Flange Bolts Zinc Clear SKU 15363 $1.84
Approved Vendor 1/2-13x3/4" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 15364 $1.54
Approved Vendor 1/2-13x3/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15365 $2.63
Approved Vendor 1/2-13x3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15366 $0.91
Approved Vendor 1/2-13x3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15367 $1.48
Approved Vendor 1/2-13x3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15368 $1.33
Approved Vendor 1/2-13x3/4" Stainless Steel Hex Cap Screws Bolts SKU 1190 $1.53
Approved Vendor 1/2-13x4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15377 $6.37
Approved Vendor 1/2-13x4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15379 $2.45
Approved Vendor 1/2-13x4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15380 $4.67
Approved Vendor 1/2-13x4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15381 $3.34
Approved Vendor 1/2-13x4" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 15382 $2.84
Approved Vendor 1/2-13x4" Stainless Steel Hex Cap Screws Bolts SKU 1201 $4.64
Approved Vendor 1/2-13x4-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15387 $7.05
Approved Vendor 1/2-13x4-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15389 $2.84
Approved Vendor 1/2-13x4-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15390 $5.29
Approved Vendor 1/2-13x4-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15391 $4.00
Approved Vendor 1/2-13x4-1/2" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 15392 $3.19
Approved Vendor 1/2-13x4-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1202 $5.35
Approved Vendor 1/2-13x4-1/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15395 $2.67
Approved Vendor 1/2-13x4-3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15399 $3.42
Approved Vendor 1/2-13x5" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15404 $7.62
Approved Vendor 1/2-13x5" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15406 $3.08
Approved Vendor 1/2-13x5" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15407 $6.37
Approved Vendor 1/2-13x5" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15408 $4.36
Approved Vendor 1/2-13x5" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 15409 $3.67
Approved Vendor 1/2-13x5" Stainless Steel Hex Cap Screws Bolts SKU 1203 $5.72
Approved Vendor 1/2-13x5-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15411 $7.14
Approved Vendor 1/2-13x5-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15412 $3.50
Approved Vendor 1/2-13x5-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15413 $6.80
Approved Vendor 1/2-13x5-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15414 $5.06
Approved Vendor 1/2-13x5-1/2" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 15415 $4.43
Approved Vendor 1/2-13x5-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1204 $6.22
Approved Vendor 1/2-13x6 Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15421 $7.49

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