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 43

Approved Vendor M8-1.25x25 Brass Hex Cap Screws SKU 28906 $3.34
Approved Vendor M8-1.25x25 Class 10.9 Hex Cap Screws Zinc Clear SKU 26790 $0.41
Approved Vendor M8-1.25x25 Class 10.9 Hex Cap Screws Zinc Yellow SKU 26818 $0.62
Approved Vendor M8-1.25x25 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26799 $0.69
Approved Vendor M8-1.25x25 Class 10.9 Hex Flange Bolts Zinc Clear SKU 26894 $0.65
Approved Vendor M8-1.25x25 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26760 $0.72
Approved Vendor M8-1.25x25 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26707 $0.65
Approved Vendor M8-1.25x25 Class 8.8 Hex Cap Screws Zinc Clear SKU 26711 $0.33
Approved Vendor M8-1.25x25 Class 8.8 Hex Flange Bolts Plain & Oil SKU 26904 $0.57
Approved Vendor M8-1.25x25 Class 8.8 Hex Flange Bolts Zinc Clear SKU 27091 $0.68
Approved Vendor M8-1.25x25 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26722 $0.81
Approved Vendor M8-1.25x25 Class 8.8 Hex Serrated Flange Bolts Zinc Clear SKU 27069 $0.71
Approved Vendor M8-1.25x25 Hex Flange Bolt Bowl Head Off Road Moto Hardware Zinc SKU 32404 $1.00
Approved Vendor M8-1.25x30 A4-70 Stainless Steel Hex Cap Screws SKU 5994 $1.28
Approved Vendor M8-1.25x30 Class 10.9 Hex Cap Screws Zinc Clear SKU 26721 $0.46
Approved Vendor M8-1.25x30 Class 10.9 Hex Cap Screws Zinc Yellow SKU 26882 $0.69
Approved Vendor M8-1.25x30 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26793 $0.75
Approved Vendor M8-1.25x30 Class 10.9 Hex Flange Bolts Zinc Clear SKU 26941 $0.77
Approved Vendor M8-1.25x30 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26718 $0.82
Approved Vendor M8-1.25x30 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26751 $0.71
Approved Vendor M8-1.25x30 Class 8.8 Hex Cap Screws Zinc Clear SKU 26720 $0.37
Approved Vendor M8-1.25x30 Class 8.8 Hex Flange Bolts Plain & Oil SKU 27295 $0.62
Approved Vendor M8-1.25x30 Class 8.8 Hex Flange Bolts Zinc Clear SKU 27020 $0.80
Approved Vendor M8-1.25x30 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26730 $0.88
Approved Vendor M8-1.25x30 Hex Flange Bolt Bowl Head Off Road Moto Hardware Zinc SKU 32403 $1.00
Approved Vendor M8-1.25x35 A4-70 Stainless Steel Hex Cap Screws SKU 5995 $1.46
Approved Vendor M8-1.25x35 Brass Hex Cap Screws SKU 28905 $3.58
Approved Vendor M8-1.25x35 Class 10.9 Hex Cap Screws Zinc Clear SKU 27008 $0.57
Approved Vendor M8-1.25x35 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27280 $0.81
Approved Vendor M8-1.25x35 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27056 $0.84
Approved Vendor M8-1.25x35 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26963 $0.90
Approved Vendor M8-1.25x35 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26983 $0.83
Approved Vendor M8-1.25x35 Class 8.8 Hex Cap Screws Zinc Clear SKU 26970 $0.69
Approved Vendor M8-1.25x35 Class 8.8 Hex Flange Bolts Zinc Clear SKU 27479 $0.86
Approved Vendor M8-1.25x35 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26860 $1.01
Approved Vendor M8-1.25x35 Hex Flange Bolt Bowl Head Off Road Moto Hardware Zinc SKU 32402 $1.00
Approved Vendor M8-1.25x40 A4-70 Stainless Steel Hex Cap Screws SKU 5996 $1.63
Approved Vendor M8-1.25x40 Class 10.9 Hex Cap Screws Zinc Clear SKU 26807 $0.81
Approved Vendor M8-1.25x40 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27215 $0.92
Approved Vendor M8-1.25x40 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27055 $0.88
Approved Vendor M8-1.25x40 Class 10.9 Hex Flange Bolts Zinc Clear SKU 27081 $1.01
Approved Vendor M8-1.25x40 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26842 $1.06
Approved Vendor M8-1.25x40 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26816 $0.94
Approved Vendor M8-1.25x40 Class 8.8 Full Thread Hex Cap Screws Zinc Clear SKU 27348 $0.47
Approved Vendor M8-1.25x40 Class 8.8 Hex Cap Screws Zinc Clear SKU 26812 $0.78
Approved Vendor M8-1.25x40 Class 8.8 Hex Flange Bolts Zinc Clear SKU 27433 $0.89
Approved Vendor M8-1.25x40 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26977 $1.05
Approved Vendor M8-1.25x40 Hex Flange Bolt Bowl Head Off Road Moto Hardware Zinc SKU 32401 $1.00

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