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 36

Approved Vendor M12-1.75x25 A4-70 Stainless Steel Hex Cap Screws SKU 6026 $2.98
Approved Vendor M12-1.75x25 Class 10.9 Hex Cap Screws Zinc Clear SKU 27254 $1.02
Approved Vendor M12-1.75x25 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27438 $1.51
Approved Vendor M12-1.75x25 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27147 $1.72
Approved Vendor M12-1.75x25 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27272 $1.98
Approved Vendor M12-1.75x25 Class 8.8 Hex Cap Screws Zinc Clear SKU 27009 $0.78
Approved Vendor M12-1.75x30 A4-70 Stainless Steel Hex Cap Screws SKU 6027 $3.22
Approved Vendor M12-1.75x30 Class 10.9 Hex Cap Screws Zinc Clear SKU 26912 $1.12
Approved Vendor M12-1.75x30 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27197 $1.67
Approved Vendor M12-1.75x30 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26984 $1.84
Approved Vendor M12-1.75x30 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26921 $1.98
Approved Vendor M12-1.75x30 Class 8.8 Hex Cap Screws Zinc Clear SKU 26967 $0.87
Approved Vendor M12-1.75x30 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 27037 $2.12
Approved Vendor M12-1.75x35 A4-70 Stainless Steel Hex Cap Screws SKU 6028 $3.55
Approved Vendor M12-1.75x35 Class 10.9 Hex Cap Screws Zinc Clear SKU 27437 $1.25
Approved Vendor M12-1.75x35 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27153 $1.83
Approved Vendor M12-1.75x35 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27051 $1.97
Approved Vendor M12-1.75x35 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26992 $1.85
Approved Vendor M12-1.75x35 Class 8.8 Hex Cap Screws Zinc Clear SKU 27375 $1.01
Approved Vendor M12-1.75x35 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 27175 $2.27
Approved Vendor M12-1.75x40 A4-70 Stainless Steel Hex Cap Screws SKU 6029 $3.82
Approved Vendor M12-1.75x40 Class 10.9 Hex Cap Screws Zinc Clear SKU 26950 $1.34
Approved Vendor M12-1.75x40 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27025 $1.99
Approved Vendor M12-1.75x40 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26879 $2.10
Approved Vendor M12-1.75x40 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26930 $2.16
Approved Vendor M12-1.75x40 Class 8.8 Hex Cap Screws Zinc Clear SKU 26873 $1.66
Approved Vendor M12-1.75x40 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 27070 $2.42
Approved Vendor M12-1.75x45 A4-70 Stainless Steel Hex Cap Screws SKU 6030 $4.19
Approved Vendor M12-1.75x45 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27127 $2.30
Approved Vendor M12-1.75x45 Class 8.8 Hex Cap Screws Zinc Clear SKU 27374 $1.74
Approved Vendor M12-1.75x45 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 28900 $2.14
Approved Vendor M12-1.75x50 A4-70 Stainless Steel Hex Cap Screws SKU 6031 $4.49
Approved Vendor M12-1.75x50 Brass Hex Cap Screws SKU 28901 $13.08
Approved Vendor M12-1.75x50 Class 10.9 Hex Cap Screws Zinc Clear SKU 26966 $1.73
Approved Vendor M12-1.75x50 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27344 $2.56
Approved Vendor M12-1.75x50 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26920 $2.46
Approved Vendor M12-1.75x50 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27050 $2.30
Approved Vendor M12-1.75x50 Class 8.8 Full Thread Hex Cap Screws Zinc Clear SKU 27490 $1.26
Approved Vendor M12-1.75x50 Class 8.8 Hex Cap Screws Zinc Clear SKU 27120 $1.39
Approved Vendor M12-1.75x50 Class 8.8 Hex Flange Bolts Zinc Yellow SKU 26986 $2.82
Approved Vendor M12-1.75x55 A4-70 Stainless Steel Hex Cap Screws SKU 6032 $4.99
Approved Vendor M12-1.75x60 A4-70 Stainless Steel Hex Cap Screws SKU 6033 $5.23
Approved Vendor M12-1.75x60 Class 10.9 Hex Cap Screws Zinc Clear SKU 27136 $1.99
Approved Vendor M12-1.75x60 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27397 $2.96
Approved Vendor M12-1.75x60 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27068 $2.79
Approved Vendor M12-1.75x60 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27035 $2.62
Approved Vendor M12-1.75x60 Class 8.8 Hex Cap Screws Zinc Clear SKU 27373 $1.78
Approved Vendor M12-1.75x60 Class 8.8 Hex Flange Bolts Plain & Oil SKU 28899 $2.29

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