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 40

Approved Vendor M6-1.0x10 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27428 $0.27
Approved Vendor M6-1.0x10 Class 10.9 Hex Flange Bolts Zinc Clear SKU 27233 $0.32
Approved Vendor M6-1.0x10 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26839 $0.34
Approved Vendor M6-1.0x10 Class 8.8 Hex Flange Bolts Zinc Clear SKU 27177 $0.31
Approved Vendor M6-1.0x10 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 27023 $0.28
Approved Vendor M6-1.0x100 A4-70 Stainless Steel Hex Cap Screws SKU 5990 $1.96
Approved Vendor M6-1.0x12 Brass Hex Cap Screws SKU 28908 $1.03
Approved Vendor M6-1.0x12 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26917 $0.29
Approved Vendor M6-1.0x12 Class 10.9 Hex Flange Bolts Zinc Clear SKU 26998 $0.33
Approved Vendor M6-1.0x12 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26827 $0.35
Approved Vendor M6-1.0x12 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26719 $0.30
Approved Vendor M6-1.0x12 Class 8.8 Hex Flange Bolts Plain & Oil SKU 27151 $0.25
Approved Vendor M6-1.0x12 Class 8.8 Hex Flange Bolts Zinc Clear SKU 27082 $0.32
Approved Vendor M6-1.0x12 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26741 $0.38
Approved Vendor M6-1.0x12 Hex Flange Bolt Indented Head Off Road Moto Hardware Zinc SKU 32424 $1.00
Approved Vendor M6-1.0x12 Hex Flange Bolt Smooth Head Free Spin Conical Washer Off Road Moto Hardware Zinc SKU 32426 $1.00
Approved Vendor M6-1.0x12 Hex Flange Bolt Smooth Head Off Road Moto Hardware Zinc SKU 32425 $1.00
Approved Vendor M6-1.0x14 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27196 $0.33
Approved Vendor M6-1.0x14 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 27134 $0.41
Approved Vendor M6-1.0x16 A4-70 Stainless Steel Hex Cap Screws SKU 5976 $0.44
Approved Vendor M6-1.0x16 Class 10.9 Hex Cap Screws Zinc Clear SKU 26822 $0.21
Approved Vendor M6-1.0x16 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26916 $0.34
Approved Vendor M6-1.0x16 Class 10.9 Hex Flange Bolts Zinc Clear SKU 26843 $0.33
Approved Vendor M6-1.0x16 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26725 $0.35
Approved Vendor M6-1.0x16 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26675 $0.31
Approved Vendor M6-1.0x16 Class 8.8 Hex Cap Screws Zinc Clear SKU 26700 $0.14
Approved Vendor M6-1.0x16 Class 8.8 Hex Flange Bolts Plain & Oil SKU 27278 $0.27
Approved Vendor M6-1.0x16 Class 8.8 Hex Flange Bolts Zinc Clear SKU 26978 $0.35
Approved Vendor M6-1.0x16 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26691 $0.38
Approved Vendor M6-1.0x16 Class 8.8 Hex Serrated Flange Bolts Zinc Clear SKU 27133 $0.32
Approved Vendor M6-1.0x16 Hex Flange Bolt Indented Head Off Road Moto Hardware Zinc SKU 32421 $1.00
Approved Vendor M6-1.0x16 Hex Flange Bolt Smooth Head Free Spin Conical Washer Off Road Moto Hardware Zinc SKU 32422 $1.00
Approved Vendor M6-1.0x16 Hex Flange Bolt Smooth Head Off Road Moto Hardware Zinc SKU 32420 $1.00
Approved Vendor M6-1.0x20 A4-70 Stainless Steel Hex Cap Screws SKU 5977 $0.50
Approved Vendor M6-1.0x20 Class 10.9 Hex Cap Screws Zinc Clear SKU 26737 $0.26
Approved Vendor M6-1.0x20 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26819 $0.36
Approved Vendor M6-1.0x20 Class 10.9 Hex Flange Bolts Zinc Clear SKU 26867 $0.36
Approved Vendor M6-1.0x20 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26693 $0.38
Approved Vendor M6-1.0x20 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26708 $0.34
Approved Vendor M6-1.0x20 Class 8.8 Hex Cap Screws Zinc Clear SKU 26688 $0.16
Approved Vendor M6-1.0x20 Class 8.8 Hex Flange Bolts Plain & Oil SKU 26948 $0.29
Approved Vendor M6-1.0x20 Class 8.8 Hex Flange Bolts Zinc Clear SKU 26973 $0.38
Approved Vendor M6-1.0x20 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26705 $0.38
Approved Vendor M6-1.0x20 Hex Flange Bolt Smooth Head Free Spin Conical Washer Off Road Moto Hardware Zinc SKU 32418 $1.00
Approved Vendor M6-1.0x20 Hex Flange Bolt Smooth Head Off Road Moto Hardware Zinc SKU 32417 $1.00
Approved Vendor M6-1.0x22 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27314 $0.38
Approved Vendor M6-1.0x25 A4-70 Stainless Steel Hex Cap Screws SKU 5978 $0.59
Approved Vendor M6-1.0x25 Class 10.9 Hex Cap Screws Zinc Clear SKU 26828 $0.23

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