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 41

Approved Vendor M6-1.0x25 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26976 $0.38
Approved Vendor M6-1.0x25 Class 10.9 Hex Flange Bolts Zinc Clear SKU 26911 $0.41
Approved Vendor M6-1.0x25 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26806 $0.44
Approved Vendor M6-1.0x25 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26742 $0.38
Approved Vendor M6-1.0x25 Class 8.8 Hex Cap Screws Zinc Clear SKU 26795 $0.18
Approved Vendor M6-1.0x25 Class 8.8 Hex Flange Bolts Plain & Oil SKU 27093 $0.34
Approved Vendor M6-1.0x25 Class 8.8 Hex Flange Bolts Zinc Clear SKU 27150 $0.44
Approved Vendor M6-1.0x25 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26785 $0.48
Approved Vendor M6-1.0x25 Hex Flange Bolt Smooth Head Off Road Moto Hardware Zinc SKU 32396 $1.00
Approved Vendor M6-1.0x30 A4-70 Stainless Steel Hex Cap Screws SKU 5979 $0.63
Approved Vendor M6-1.0x30 Class 10.9 Hex Cap Screws Zinc Clear SKU 26924 $0.39
Approved Vendor M6-1.0x30 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27174 $0.42
Approved Vendor M6-1.0x30 Class 10.9 Hex Flange Bolts Zinc Clear SKU 27195 $0.46
Approved Vendor M6-1.0x30 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26923 $0.48
Approved Vendor M6-1.0x30 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26864 $0.42
Approved Vendor M6-1.0x30 Class 8.8 Hex Cap Screws Zinc Clear SKU 26901 $0.23
Approved Vendor M6-1.0x30 Class 8.8 Hex Flange Bolts Plain & Oil SKU 27235 $0.35
Approved Vendor M6-1.0x30 Class 8.8 Hex Flange Bolts Zinc Clear SKU 27392 $0.46
Approved Vendor M6-1.0x30 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26918 $0.47
Approved Vendor M6-1.0x30 Hex Flange Bolt Smooth Head Off Road Moto Hardware Zinc SKU 32415 $1.00
Approved Vendor M6-1.0x35 A4-70 Stainless Steel Hex Cap Screws SKU 5980 $0.74
Approved Vendor M6-1.0x35 Brass Hex Cap Screws SKU 28907 $1.95
Approved Vendor M6-1.0x35 Class 10.9 Hex Cap Screws Zinc Clear SKU 27180 $0.45
Approved Vendor M6-1.0x35 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27173 $0.46
Approved Vendor M6-1.0x35 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27340 $0.47
Approved Vendor M6-1.0x35 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 27292 $0.50
Approved Vendor M6-1.0x35 Class 8.8 Hex Cap Screws Zinc Clear SKU 27284 $0.33
Approved Vendor M6-1.0x35 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 27253 $0.52
Approved Vendor M6-1.0x35 Hex Flange Bolt Smooth Head Off Road Moto Hardware Zinc SKU 32414 $1.00
Approved Vendor M6-1.0x40 A4-70 Stainless Steel Hex Cap Screws SKU 5981 $0.78
Approved Vendor M6-1.0x40 Class 10.9 Hex Cap Screws Zinc Clear SKU 27112 $0.40
Approved Vendor M6-1.0x40 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27275 $0.57
Approved Vendor M6-1.0x40 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26878 $0.54
Approved Vendor M6-1.0x40 Class 8.8 Hex Cap Screws Zinc Clear SKU 26974 $0.37
Approved Vendor M6-1.0x40 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 27435 $0.63
Approved Vendor M6-1.0x40 Hex Flange Bolt Smooth Head Off Road Moto Hardware Zinc SKU 32413 $1.00
Approved Vendor M6-1.0x45 A4-70 Stainless Steel Hex Cap Screws SKU 5982 $0.86
Approved Vendor M6-1.0x45 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27251 $0.61
Approved Vendor M6-1.0x45 Hex Flange Bolt Smooth Head Off Road Moto Hardware Zinc SKU 32412 $1.00
Approved Vendor M6-1.0x50 A4-70 Stainless Steel Hex Cap Screws SKU 5983 $0.95
Approved Vendor M6-1.0x50 Class 10.9 Hex Cap Screws Zinc Clear SKU 27281 $0.48
Approved Vendor M6-1.0x50 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27211 $0.66
Approved Vendor M6-1.0x50 Class 8.8 Hex Cap Screws Zinc Clear SKU 27041 $0.44
Approved Vendor M6-1.0x50 Class 8.8 Hex Flange Bolts Zinc Clear SKU 27434 $0.67
Approved Vendor M6-1.0x55 A4-70 Stainless Steel Hex Cap Screws SKU 5984 $1.05
Approved Vendor M6-1.0x60 A4-70 Stainless Steel Hex Cap Screws SKU 5985 $1.13
Approved Vendor M6-1.0x60 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27473 $0.69
Approved Vendor M6-1.0x60 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27111 $0.70

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