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 16

Approved Vendor 3/4-10x7" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 21328 $17.30
Approved Vendor 3/4-10x7-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21330 $21.71
Approved Vendor 3/4-10x8" Stainless Steel Hex Cap Screws Bolts SKU 1256 $17.82
Approved Vendor 3/4-10x8" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21331 $22.73
Approved Vendor 3/4-10x8" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 21332 $18.00
Approved Vendor 3/4-10x9" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 21335 $25.50
Approved Vendor 3/4-16x1" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 21336 $3.93
Approved Vendor 3/4-16x1" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21337 $5.57
Approved Vendor 3/4-16x1-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 21338 $4.41
Approved Vendor 3/4-16x1-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21339 $6.61
Approved Vendor 3/4-16x1-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 21340 $6.06
Approved Vendor 3/4-16x1-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1402 $9.76
Approved Vendor 3/4-16x1-1/4" Stainless Steel Hex Cap Screws Bolts SKU 1401 $9.30
Approved Vendor 3/4-16x1-1/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 21341 $4.17
Approved Vendor 3/4-16x1-1/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21342 $6.02
Approved Vendor 3/4-16x1-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 21343 $5.70
Approved Vendor 3/4-16x1-3/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 21344 $10.21
Approved Vendor 3/4-16x1-3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 21345 $4.58
Approved Vendor 3/4-16x1-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21346 $7.17
Approved Vendor 3/4-16x1-3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 21347 $6.34
Approved Vendor 3/4-16x1-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1403 $10.02
Approved Vendor 3/4-16x2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 21348 $12.37
Approved Vendor 3/4-16x2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 21349 $4.83
Approved Vendor 3/4-16x2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21350 $7.49
Approved Vendor 3/4-16x2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 21351 $6.23
Approved Vendor 3/4-16x2" Stainless Steel Hex Cap Screws Bolts SKU 1404 $10.32
Approved Vendor 3/4-16x2-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 21352 $13.97
Approved Vendor 3/4-16x2-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 21353 $5.65
Approved Vendor 3/4-16x2-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21354 $8.77
Approved Vendor 3/4-16x2-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 21355 $7.64
Approved Vendor 3/4-16x2-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1406 $12.00
Approved Vendor 3/4-16x2-1/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 21356 $13.14
Approved Vendor 3/4-16x2-1/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21357 $8.50
Approved Vendor 3/4-16x2-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 21358 $7.39
Approved Vendor 3/4-16x2-1/4" Stainless Steel Hex Cap Screws Bolts SKU 1405 $10.82
Approved Vendor 3/4-16x2-3/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 21359 $11.85
Approved Vendor 3/4-16x2-3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 21360 $6.07
Approved Vendor 3/4-16x2-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21361 $9.87
Approved Vendor 3/4-16x2-3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 21362 $8.61
Approved Vendor 3/4-16x2-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1407 $12.82
Approved Vendor 3/4-16x3" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 21363 $14.86
Approved Vendor 3/4-16x3" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 21364 $6.49
Approved Vendor 3/4-16x3" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21365 $10.06
Approved Vendor 3/4-16x3" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 21366 $8.78
Approved Vendor 3/4-16x3" Stainless Steel Hex Cap Screws Bolts SKU 1408 $13.64
Approved Vendor 3/4-16x3-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1409 $15.28
Approved Vendor 3/4-16x3-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 21367 $13.30
Approved Vendor 3/4-16x3-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 21368 $11.38

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