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 42

Approved Vendor M6-1.0x60 Class 8.8 Hex Cap Screws Zinc Clear SKU 27495 $0.51
Approved Vendor M6-1.0x70 A4-70 Stainless Steel Hex Cap Screws SKU 5986 $1.30
Approved Vendor M6-1.0x70 Class 8.8 Hex Cap Screws Zinc Clear SKU 27442 $0.64
Approved Vendor M6-1.0x75 A4-70 Stainless Steel Hex Cap Screws SKU 5987 $1.37
Approved Vendor M6-1.0x80 A4-70 Stainless Steel Hex Cap Screws SKU 5988 $1.45
Approved Vendor M6-1.0x90 A4-70 Stainless Steel Hex Cap Screws SKU 5989 $1.83
Approved Vendor M7-1.00x30 Class 10.9 Hex Cap Screws Zinc Clear SKU 27377 $0.68
Approved Vendor M7-1.00x35 Class 10.9 Hex Cap Screws Zinc Clear SKU 28929 $0.75
Approved Vendor M8-1.0x20 Class 8.8 Hex Cap Screws Zinc Clear SKU 27403 $0.47
Approved Vendor M8-1.0x30 Class 8.8 Hex Cap Screws Zinc Clear SKU 27493 $0.60
Approved Vendor M8-1.0x65 Class 8.8 Hex Cap Screws Zinc Clear SKU 28927 $1.06
Approved Vendor M8-1.0x70 Class 8.8 Hex Cap Screws Zinc Clear SKU 28926 $1.11
Approved Vendor M8-1.25x100 A4-70 Stainless Steel Hex Cap Screws SKU 6005 $3.59
Approved Vendor M8-1.25x100 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27053 $3.69
Approved Vendor M8-1.25x12 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27427 $0.54
Approved Vendor M8-1.25x12 Class 10.9 Hex Flange Bolts Zinc Clear SKU 26959 $0.54
Approved Vendor M8-1.25x12 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27132 $0.68
Approved Vendor M8-1.25x12 Class 8.8 Hex Cap Screws Zinc Clear SKU 27405 $0.38
Approved Vendor M8-1.25x12 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 27092 $0.68
Approved Vendor M8-1.25x14 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27390 $0.58
Approved Vendor M8-1.25x16 A4-70 Stainless Steel Hex Cap Screws SKU 5991 $0.91
Approved Vendor M8-1.25x16 Class 10.9 Hex Cap Screws Zinc Clear SKU 27179 $0.44
Approved Vendor M8-1.25x16 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27200 $0.52
Approved Vendor M8-1.25x16 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27172 $0.58
Approved Vendor M8-1.25x16 Class 10.9 Hex Flange Bolts Zinc Clear SKU 26975 $0.60
Approved Vendor M8-1.25x16 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26821 $0.69
Approved Vendor M8-1.25x16 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26714 $0.56
Approved Vendor M8-1.25x16 Class 8.8 Hex Cap Screws Zinc Clear SKU 26868 $0.27
Approved Vendor M8-1.25x16 Class 8.8 Hex Flange Bolts Zinc Clear SKU 27252 $0.68
Approved Vendor M8-1.25x16 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26784 $0.67
Approved Vendor M8-1.25x16 Class 8.8 Hex Serrated Flange Bolts Zinc Clear SKU 27429 $0.68
Approved Vendor M8-1.25x16 Hex Flange Bolt Bowl Head Off Road Moto Hardware Zinc SKU 32407 $1.00
Approved Vendor M8-1.25x160 Class 8.8 Hex Cap Screws Zinc Clear SKU 28928 $4.84
Approved Vendor M8-1.25x20 A4-70 Stainless Steel Hex Cap Screws SKU 5992 $0.99
Approved Vendor M8-1.25x20 Class 10.9 Hex Cap Screws Zinc Clear SKU 26811 $0.37
Approved Vendor M8-1.25x20 Class 10.9 Hex Cap Screws Zinc Yellow SKU 26942 $0.57
Approved Vendor M8-1.25x20 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26805 $0.64
Approved Vendor M8-1.25x20 Class 10.9 Hex Flange Bolts Zinc Clear SKU 26964 $0.57
Approved Vendor M8-1.25x20 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26702 $0.66
Approved Vendor M8-1.25x20 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26715 $0.61
Approved Vendor M8-1.25x20 Class 8.8 Hex Cap Screws Zinc Clear SKU 26690 $0.29
Approved Vendor M8-1.25x20 Class 8.8 Hex Flange Bolts Plain & Oil SKU 27022 $0.50
Approved Vendor M8-1.25x20 Class 8.8 Hex Flange Bolts Zinc Clear SKU 27021 $0.63
Approved Vendor M8-1.25x20 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26731 $0.67
Approved Vendor M8-1.25x20 Class 8.8 Hex Serrated Flange Bolts Zinc Clear SKU 27277 $0.58
Approved Vendor M8-1.25x20 Hex Flange Bolt Bowl Head Off Road Moto Hardware Zinc SKU 32406 $1.00
Approved Vendor M8-1.25x22 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26997 $0.69
Approved Vendor M8-1.25x25 A4-70 Stainless Steel Hex Cap Screws SKU 5993 $1.09

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