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 35

Approved Vendor M10-1.5x80 Class 10.9 Hex Cap Screws Zinc Clear SKU 27320 $2.01
Approved Vendor M10-1.5x80 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27052 $2.33
Approved Vendor M10-1.5x80 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26866 $2.74
Approved Vendor M10-1.5x80 Class 8.8 Hex Cap Screws Zinc Clear SKU 27402 $1.64
Approved Vendor M10-1.5x90 A4-70 Stainless Steel Hex Cap Screws SKU 6020 $5.51
Approved Vendor M10-1.5x90 Class 10.9 Hex Cap Screws Zinc Clear SKU 27398 $2.77
Approved Vendor M10-1.5x90 Class 10.9 Hex Flange Bolts Zinc Clear SKU 27362 $2.84
Approved Vendor M10-1.5x90 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 26947 $2.42
Approved Vendor M10-1.5x90 Class 8.8 Hex Cap Screws Zinc Clear SKU 27492 $1.65
Approved Vendor M12-1.25x100 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26858 $4.87
Approved Vendor M12-1.25x20 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 27034 $1.85
Approved Vendor M12-1.25x25 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26863 $2.00
Approved Vendor M12-1.25x30 Class 10.9 Extra Fine Thread Hex Cap Screws Zinc Clear SKU 27213 $1.86
Approved Vendor M12-1.25x30 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26808 $2.11
Approved Vendor M12-1.25x35 Class 10.9 Extra Fine Thread Hex Cap Screws Zinc Clear SKU 27236 $2.05
Approved Vendor M12-1.25x35 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26757 $2.31
Approved Vendor M12-1.25x40 Class 10.9 Extra Fine Thread Hex Cap Screws Zinc Clear SKU 26965 $2.23
Approved Vendor M12-1.25x40 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26831 $2.49
Approved Vendor M12-1.25x45 Class 10.9 Extra Fine Thread Hex Cap Screws Zinc Clear SKU 27135 $2.40
Approved Vendor M12-1.25x45 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26886 $2.67
Approved Vendor M12-1.25x50 Class 10.9 Extra Fine Thread Hex Cap Screws Zinc Clear SKU 27317 $2.86
Approved Vendor M12-1.25x50 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26847 $3.01
Approved Vendor M12-1.25x55 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 27090 $3.17
Approved Vendor M12-1.25x60 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26836 $3.55
Approved Vendor M12-1.25x70 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26778 $3.88
Approved Vendor M12-1.25x80 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26871 $4.30
Approved Vendor M12-1.25x90 Class 10.9 JIS Hex Flange Bolts Zinc Clear SKU 26929 $4.55
Approved Vendor M12-1.50x100 Class 8.8 Hex Cap Screws Zinc Clear SKU 27299 $3.95
Approved Vendor M12-1.50x150 Class 8.8 Hex Cap Screws Zinc Clear SKU 28924 $7.70
Approved Vendor M12-1.50x20 Class 8.8 Hex Cap Screws Zinc Clear SKU 27489 $1.24
Approved Vendor M12-1.50x30 Class 8.8 Hex Cap Screws Zinc Clear SKU 27441 $2.01
Approved Vendor M12-1.50x35 Class 10.9 Fine Thread Hex Cap Screws Zinc Clear SKU 27367 $1.95
Approved Vendor M12-1.50x40 Class 8.8 Hex Cap Screws Zinc Clear SKU 27440 $1.81
Approved Vendor M12-1.50x60 Class 10.9 Fine Thread Hex Cap Screws Zinc Clear SKU 27318 $3.16
Approved Vendor M12-1.5x25 Class 10.9 Fine Thread Hex Flange Bolts Phos & Oil SKU 26913 $2.39
Approved Vendor M12-1.5x40 Class 10.9 Fine Thread Hex Flange Bolts Phos & Oil SKU 26686 $2.79
Approved Vendor M12-1.75x100 A4-70 Stainless Steel Hex Cap Screws SKU 6039 $8.56
Approved Vendor M12-1.75x100 Class 10.9 Hex Flange Bolts Phos & Oil SKU 27271 $4.11
Approved Vendor M12-1.75x100 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27018 $3.79
Approved Vendor M12-1.75x110 A4-70 Stainless Steel Hex Cap Screws SKU 6040 $9.55
Approved Vendor M12-1.75x110 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26969 $4.43
Approved Vendor M12-1.75x120 A4-70 Stainless Steel Hex Cap Screws SKU 6041 $10.39
Approved Vendor M12-1.75x120 Class 10.9 Hex Flange Bolts Phos & Oil SKU 26909 $4.86
Approved Vendor M12-1.75x130 A4-70 Stainless Steel Hex Cap Screws SKU 6042 $12.33
Approved Vendor M12-1.75x130 Class 10.9 Hex Cap Screws Zinc Yellow SKU 27436 $6.18
Approved Vendor M12-1.75x20 A4-70 Stainless Steel Hex Cap Screws SKU 6025 $2.75
Approved Vendor M12-1.75x20 Class 10.9 Hex Flange Bolts Zinc Yellow SKU 27273 $1.57
Approved Vendor M12-1.75x20 Class 8.8 Hex Cap Screws Zinc Clear SKU 27154 $0.94

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