Hex Bolts & Cap Screws

2,000+ products

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 3

Approved Vendor 1/2"-20x5" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15061 $17.24
Approved Vendor 1/2"-20x6" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15064 $20.53
Approved Vendor 1/2-13x1" Grade 5 Serrated Hex Flange Bolts Zinc Yellow SKU 15164 $1.76
Approved Vendor 1/2-13x1" Brass Hex Tap Bolts Full Thread SKU 15173 $10.26
Approved Vendor 1/2-13x1" Grade 5 Hex Flange Bolts Zinc Clear SKU 15174 $1.97
Approved Vendor 1/2-13x1" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 15176 $2.03
Approved Vendor 1/2-13x1" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15177 $2.68
Approved Vendor 1/2-13x1" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 15178 $3.15
Approved Vendor 1/2-13x1" Grade 8 Serrated Hex Flange Bolts Zinc Clear SKU 15179 $2.18
Approved Vendor 1/2-13x1" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15180 $0.83
Approved Vendor 1/2-13x1" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15181 $1.60
Approved Vendor 1/2-13x1" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15182 $1.26
Approved Vendor 1/2-13x1" Stainless Steel Hex Cap Screws Bolts SKU 1191 $1.66
Approved Vendor 1/2-13x1-1/2" Grade 5 Serrated Hex Flange Bolts Zinc Yellow SKU 15184 $2.08
Approved Vendor 1/2-13x1-1/2" 18-8 Stainless Steel Serrated Hex Flange Bolts SKU 2102 $4.88
Approved Vendor 1/2-13x1-1/2" Brass Hex Tap Bolts Full Thread SKU 15193 $13.16
Approved Vendor 1/2-13x1-1/2" Grade 5 Hex Flange Bolts Zinc Clear SKU 15196 $2.24
Approved Vendor 1/2-13x1-1/2" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 15198 $2.42
Approved Vendor 1/2-13x1-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15199 $2.75
Approved Vendor 1/2-13x1-1/2" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 15200 $3.22
Approved Vendor 1/2-13x1-1/2" Grade 8 Serrated Hex Flange Bolts Zinc Clear SKU 15201 $2.44
Approved Vendor 1/2-13x1-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15202 $1.08
Approved Vendor 1/2-13x1-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15203 $2.05
Approved Vendor 1/2-13x1-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15204 $1.50
Approved Vendor 1/2-13x1-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1193 $2.01
Approved Vendor 1/2-13x1-1/4" 18-8 Stainless Steel Serrated Hex Flange Bolts SKU 2101 $4.52
Approved Vendor 1/2-13x1-1/4" Brass Hex Tap Bolts Full Thread SKU 15209 $11.66
Approved Vendor 1/2-13x1-1/4" Grade 5 Hex Flange Bolts Zinc Clear SKU 15212 $2.12
Approved Vendor 1/2-13x1-1/4" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 15214 $2.10
Approved Vendor 1/2-13x1-1/4" Grade 5 Serrated Hex Flange Bolts Zinc Yellow SKU 15215 $1.89
Approved Vendor 1/2-13x1-1/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15216 $2.84
Approved Vendor 1/2-13x1-1/4" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 15217 $3.34
Approved Vendor 1/2-13x1-1/4" Grade 8 Serrated Hex Flange Bolts Zinc Clear SKU 15218 $2.28
Approved Vendor 1/2-13x1-1/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15219 $0.92
Approved Vendor 1/2-13x1-1/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15220 $1.80
Approved Vendor 1/2-13x1-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15221 $1.31
Approved Vendor 1/2-13x1-1/4" Stainless Steel Hex Cap Screws Bolts SKU 1192 $1.88
Approved Vendor 1/2-13x1-3/4" 18-8 Stainless Steel Serrated Hex Flange Bolts SKU 2103 $5.22
Approved Vendor 1/2-13x1-3/4" Brass Hex Tap Bolts Full Thread SKU 15231 $12.81
Approved Vendor 1/2-13x1-3/4" Grade 5 Hex Flange Bolts Zinc Clear SKU 15232 $2.51
Approved Vendor 1/2-13x1-3/4" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 15234 $3.02
Approved Vendor 1/2-13x1-3/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 15235 $3.36
Approved Vendor 1/2-13x1-3/4" Grade 8 Hex Flange Frame Bolts Zinc Yellow SKU 15236 $3.95
Approved Vendor 1/2-13x1-3/4" Grade 8 Serrated Hex Flange Bolts Zinc Clear SKU 15237 $2.58
Approved Vendor 1/2-13x1-3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 15238 $1.20
Approved Vendor 1/2-13x1-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 15239 $2.31
Approved Vendor 1/2-13x1-3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 15240 $1.69
Approved Vendor 1/2-13x1-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1194 $2.20

More in Fasteners