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 10

Approved Vendor 1/4-20x1-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 16980 $0.53
Approved Vendor 1/4-20x1-3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 16981 $0.45
Approved Vendor 1/4-20x1-3/4" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 16982 $0.37
Approved Vendor 1/4-20x1-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1119 $0.52
Approved Vendor 1/4-20x1/2" 18-8 Stainless Steel Serrated Hex Flange Bolts SKU 2079 $0.55
Approved Vendor 1/4-20x1/2" Brass Hex Tap Bolts Full Thread SKU 17005 $1.24
Approved Vendor 1/4-20x1/2" Grade 5 Hex Flange Bolts Zinc Clear SKU 17007 $0.27
Approved Vendor 1/4-20x1/2" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 17008 $0.26
Approved Vendor 1/4-20x1/2" Grade 5 Serrated Hex Flange Bolts Zinc Yellow SKU 17009 $0.23
Approved Vendor 1/4-20x1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 17010 $0.39
Approved Vendor 1/4-20x1/2" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 17011 $0.45
Approved Vendor 1/4-20x1/2" Grade 8 Serrated Hex Flange Bolts Zinc Clear SKU 17012 $0.31
Approved Vendor 1/4-20x1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 17013 $0.14
Approved Vendor 1/4-20x1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 17014 $0.24
Approved Vendor 1/4-20x1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 17015 $0.21
Approved Vendor 1/4-20x1/2" Stainless Steel Hex Cap Screws Bolts SKU 1112 $0.25
Approved Vendor 1/4-20x2" 18-8 Stainless Steel Serrated Hex Flange Bolts SKU 2085 $1.06
Approved Vendor 1/4-20x2" Brass Hex Tap Bolts Full Thread SKU 17040 $3.36
Approved Vendor 1/4-20x2" Grade 5 Hex Flange Bolts Zinc Clear SKU 17041 $0.62
Approved Vendor 1/4-20x2" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 17043 $0.63
Approved Vendor 1/4-20x2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 17044 $0.79
Approved Vendor 1/4-20x2" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 17045 $0.93
Approved Vendor 1/4-20x2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 17046 $0.35
Approved Vendor 1/4-20x2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 17047 $0.61
Approved Vendor 1/4-20x2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 17048 $0.51
Approved Vendor 1/4-20x2" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 17049 $0.40
Approved Vendor 1/4-20x2" Stainless Steel Hex Cap Screws Bolts SKU 1120 $0.55
Approved Vendor 1/4-20x2-1/2" Brass Hex Tap Bolts Full Thread SKU 17068 $4.10
Approved Vendor 1/4-20x2-1/2" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 17070 $0.72
Approved Vendor 1/4-20x2-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 17071 $0.95
Approved Vendor 1/4-20x2-1/2" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 17072 $1.11
Approved Vendor 1/4-20x2-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 17073 $0.43
Approved Vendor 1/4-20x2-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 17074 $0.75
Approved Vendor 1/4-20x2-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 17075 $0.63
Approved Vendor 1/4-20x2-1/2" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 17076 $0.46
Approved Vendor 1/4-20x2-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1122 $0.72
Approved Vendor 1/4-20x2-1/4" Brass Hex Tap Bolts Full Thread SKU 17089 $3.21
Approved Vendor 1/4-20x2-1/4" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 17091 $0.49
Approved Vendor 1/4-20x2-1/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 17092 $0.87
Approved Vendor 1/4-20x2-1/4" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 17093 $1.02
Approved Vendor 1/4-20x2-1/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 17094 $0.37
Approved Vendor 1/4-20x2-1/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 17095 $0.72
Approved Vendor 1/4-20x2-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 17096 $0.61
Approved Vendor 1/4-20x2-1/4" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 17097 $0.46
Approved Vendor 1/4-20x2-1/4" Stainless Steel Hex Cap Screws Bolts SKU 1121 $0.66
Approved Vendor 1/4-20x2-3/4" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 17104 $0.56
Approved Vendor 1/4-20x2-3/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 17105 $0.98
Approved Vendor 1/4-20x2-3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 17106 $0.51

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