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 28

Approved Vendor 5/8-18x8" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 28973 $15.39
Milwaukee 5PC Bolt Reflective Sticker Set - Blue SKU 495-48-73-4605 $20.35/pack of 5
Approved Vendor 7/16"-14 Coarse 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 264 PCS SKU 31663 $171.99/pack of 264
Approved Vendor 7/16"-14 Coarse 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 527 PCS SKU 26464 $213.54/pack of 527
Approved Vendor 7/16"-14 Coarse 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 528 PCS SKU 31668 $272.69/pack of 528
Approved Vendor 7/16"-14 Coarse Grade 5 Hex Cap Screws, Nuts, & Washers - 264 PCS SKU 31660 $49.95/pack of 264
Approved Vendor 7/16"-14 Coarse Grade 5 Hex Cap Screws, Nuts, & Washers - 527 PCS SKU 26463 $125.49/pack of 527
Approved Vendor 7/16"-14 Coarse Grade 5 Hex Cap Screws, Nuts, & Washers - 528 PCS SKU 31666 $184.64/pack of 528
Approved Vendor 7/16"-14 Coarse Grade 8 Hex Cap Screws, Nuts, & Washers - 264 PCS SKU 31665 $134.96/pack of 264
Approved Vendor 7/16"-14 Coarse Grade 8 Hex Cap Screws, Nuts, & Washers - 527 PCS SKU 26466 $152.95/pack of 527
Approved Vendor 7/16"-14 Coarse Grade 8 Hex Cap Screws, Nuts, & Washers - 528 PCS SKU 31670 $212.10/pack of 528
Approved Vendor 7/16"-20 Fine 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 264 PCS SKU 31662 $196.98/pack of 264
Approved Vendor 7/16"-20 Fine 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 527 PCS SKU 26465 $254.44/pack of 527
Approved Vendor 7/16"-20 Fine 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 528 PCS SKU 31669 $313.59/pack of 528
Approved Vendor 7/16"-20 Fine Grade 5 Hex Cap Screws, Nuts, & Washers - 264 PCS SKU 31661 $124.17/pack of 264
Approved Vendor 7/16"-20 Fine Grade 5 Hex Cap Screws, Nuts, & Washers - 527 PCS SKU 26462 $135.28/pack of 527
Approved Vendor 7/16"-20 Fine Grade 5 Hex Cap Screws, Nuts, & Washers - 528 PCS SKU 31667 $194.43/pack of 528
Approved Vendor 7/16"-20 Fine Grade 8 Hex Cap Screws, Nuts, & Washers - 264 PCS SKU 31664 $144.20/pack of 264
Approved Vendor 7/16"-20 Fine Grade 8 Hex Cap Screws, Nuts, & Washers - 527 PCS SKU 26467 $168.07/pack of 527
Approved Vendor 7/16"-20 Fine Grade 8 Hex Cap Screws, Nuts, & Washers - 528 PCS SKU 31671 $227.22/pack of 528
Approved Vendor 7/16-14x1" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 26762 $1.82
Approved Vendor 7/16-14x1" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 26801 $0.82
Approved Vendor 7/16-14x1" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 27059 $1.16
Approved Vendor 7/16-14x1" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 26744 $1.08
Approved Vendor 7/16-14x1" Stainless Steel Hex Cap Screws Bolts SKU 1176 $1.59
Approved Vendor 7/16-14x1-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 26817 $2.26
Approved Vendor 7/16-14x1-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 26727 $1.04
Approved Vendor 7/16-14x1-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 26953 $1.58
Approved Vendor 7/16-14x1-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 26701 $1.38
Approved Vendor 7/16-14x1-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1178 $1.97
Approved Vendor 7/16-14x1-1/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 26775 $2.13
Approved Vendor 7/16-14x1-1/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 27138 $0.92
Approved Vendor 7/16-14x1-1/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 27123 $1.33
Approved Vendor 7/16-14x1-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 26765 $1.22
Approved Vendor 7/16-14x1-3/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 27242 $2.56
Approved Vendor 7/16-14x1-3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27030 $1.57
Approved Vendor 7/16-14x1-3/4" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 28958 $1.30
Approved Vendor 7/16-14x1-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1179 $2.22
Approved Vendor 7/16-14x2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 27241 $2.79
Approved Vendor 7/16-14x2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 26854 $1.29
Approved Vendor 7/16-14x2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 27097 $2.00
Approved Vendor 7/16-14x2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 26769 $1.76
Approved Vendor 7/16-14x2" Stainless Steel Hex Cap Screws Bolts SKU 1180 $2.46
Approved Vendor 7/16-14x2-1/2" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 27300 $3.26
Approved Vendor 7/16-14x2-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 26927 $1.59
Approved Vendor 7/16-14x2-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 27218 $2.38
Approved Vendor 7/16-14x2-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 26850 $2.15
Approved Vendor 7/16-14x2-1/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 27122 $3.02

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