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 2

Approved Vendor 1/2"-13 Coarse Grade 8 Hex Cap Screws, Nuts, & Washers - 496 PCS SKU 14765 $142.27/pack of 496
Approved Vendor 1/2"-13 Coarse Grade 8 Hex Cap Screws, Nuts, & Washers - 497 PCS SKU 14766 $201.42/pack of 497
Approved Vendor 1/2"-13x1" Aluminum Hex Head Cap Screw SKU 14851 $8.67
Approved Vendor 1/2"-13x1" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14854 $4.02
Approved Vendor 1/2"-13x1-1/2" Aluminum Hex Head Cap Screw SKU 14858 $9.03
Approved Vendor 1/2"-13x1-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14861 $5.21
Approved Vendor 1/2"-13x1-1/4" Aluminum Hex Head Cap Screw SKU 14865 $9.36
Approved Vendor 1/2"-13x1-3/4" Aluminum Hex Head Cap Screw SKU 14870 $10.28
Approved Vendor 1/2"-13x1-3/4" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14871 $5.81
Approved Vendor 1/2"-13x2" Aluminum Hex Head Cap Screw SKU 14883 $9.95
Approved Vendor 1/2"-13x2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14886 $6.64
Approved Vendor 1/2"-13x2-1/2" Aluminum Hex Head Cap Screw SKU 14890 $11.94
Approved Vendor 1/2"-13x2-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14893 $7.68
Approved Vendor 1/2"-13x2-1/4" Aluminum Hex Head Cap Screw SKU 14897 $11.08
Approved Vendor 1/2"-13x2-3/4" Aluminum Hex Head Cap Screw SKU 14900 $12.51
Approved Vendor 1/2"-13x2-3/4" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14902 $8.38
Approved Vendor 1/2"-13x3" Aluminum Hex Head Cap Screw SKU 14904 $13.61
Approved Vendor 1/2"-13x3" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14907 $8.88
Approved Vendor 1/2"-13x3-1/2" Aluminum Hex Head Cap Screw SKU 14911 $16.20
Approved Vendor 1/2"-13x3-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14913 $10.18
Approved Vendor 1/2"-13x4" Aluminum Hex Head Cap Screw SKU 14922 $16.89
Approved Vendor 1/2"-13x4" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14924 $11.37
Approved Vendor 1/2"-13x4-1/2" Aluminum Hex Head Cap Screw SKU 14927 $20.07
Approved Vendor 1/2"-13x4-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14928 $13.47
Approved Vendor 1/2"-13x5" Aluminum Hex Head Cap Screw SKU 14932 $20.35
Approved Vendor 1/2"-13x5" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14933 $15.17
Approved Vendor 1/2"-13x5-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14936 $16.47
Approved Vendor 1/2"-13x6" Aluminum Hex Head Cap Screw SKU 14941 $26.23
Approved Vendor 1/2"-13x6" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 14942 $17.13
Approved Vendor 1/2"-20 Fine 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 249 PCS SKU 14973 $196.32/pack of 249
Approved Vendor 1/2"-20 Fine 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 496 PCS SKU 14974 $253.35/pack of 496
Approved Vendor 1/2"-20 Fine 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 497 PCS SKU 14975 $312.50/pack of 497
Approved Vendor 1/2"-20 Fine Grade 5 Hex Cap Screws, Nuts, & Washers - 249 PCS SKU 14976 $127.45/pack of 249
Approved Vendor 1/2"-20 Fine Grade 5 Hex Cap Screws, Nuts, & Washers - 496 PCS SKU 14977 $140.65/pack of 496
Approved Vendor 1/2"-20 Fine Grade 5 Hex Cap Screws, Nuts, & Washers - 497 PCS SKU 14978 $592.07/pack of 497
Approved Vendor 1/2"-20 Fine Grade 8 Hex Cap Screws, Nuts, & Washers - 249 PCS SKU 14979 $150.42/pack of 249
Approved Vendor 1/2"-20 Fine Grade 8 Hex Cap Screws, Nuts, & Washers - 496 PCS SKU 14980 $178.24/pack of 496
Approved Vendor 1/2"-20 Fine Grade 8 Hex Cap Screws, Nuts, & Washers - 497 PCS SKU 14981 $201.42/pack of 497
Approved Vendor 1/2"-20x1" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15041 $4.58
Approved Vendor 1/2"-20x1-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15043 $5.82
Approved Vendor 1/2"-20x1-1/4" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15045 $5.19
Approved Vendor 1/2"-20x1-3/4" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15046 $6.46
Approved Vendor 1/2"-20x2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15050 $7.16
Approved Vendor 1/2"-20x2-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15051 $8.45
Approved Vendor 1/2"-20x3" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15052 $9.75
Approved Vendor 1/2"-20x3-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15053 $11.14
Approved Vendor 1/2"-20x4" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15059 $12.43
Approved Vendor 1/2"-20x4-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 15060 $15.43

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