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 29

• Approved Vendor 7/16-14x2-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27451 $2.04
• Approved Vendor 7/16-14x2-1/4" Hex Tap Bolts Grade 5 Full Thread Zinc SKU 28957 $1.56
• Approved Vendor 7/16-14x2-1/4" Stainless Steel Hex Cap Screws Bolts SKU 1181 $2.74
• Approved Vendor 7/16-14x2-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 31610 $2.70
• Approved Vendor 7/16-14x3" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 27217 $3.71
• Approved Vendor 7/16-14x3" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 26889 $1.85
• Approved Vendor 7/16-14x3" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 27302 $2.79
• Approved Vendor 7/16-14x3" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 26926 $2.51
• Approved Vendor 7/16-14x3-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 27114 $2.12
• Approved Vendor 7/16-14x3-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27183 $2.90
• Approved Vendor 7/16-14x3/4" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 27301 $1.10
• Approved Vendor 7/16-14x3/4" Grade 8 Hex Flange Frame Bolts Phos & Oil SKU 27243 $1.32
• Approved Vendor 7/16-14x3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 27285 $0.75
• Approved Vendor 7/16-14x3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27084 $0.97
• Approved Vendor 7/16-14x3/4" Stainless Steel Hex Cap Screws Bolts SKU 1174 $1.44
• Approved Vendor 7/16-14x4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 27201 $2.49
• Approved Vendor 7/16-14x4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27221 $3.33
• Approved Vendor 7/16-14x4-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27450 $3.90
• Approved Vendor 7/16-14x4-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1187 $5.29
• Approved Vendor 7/16-14x5" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 27410 $3.17
• Approved Vendor 7/16-14x5" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27304 $4.40
• Approved Vendor 7/16-14x7" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27449 $7.85
• Approved Vendor 7/16-14x7/8" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 28989 $0.82
• Approved Vendor 7/16-14x7/8" Stainless Steel Hex Cap Screws Bolts SKU 1175 $1.50
• Approved Vendor 7/16-20x1" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27182 $1.18
• Approved Vendor 7/16-20x1" Stainless Steel Hex Cap Screws Bolts SKU 1341 $1.94
• Approved Vendor 7/16-20x1-1/2" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 27349 $1.80
• Approved Vendor 7/16-20x1-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27157 $1.59
• Approved Vendor 7/16-20x1-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1343 $2.47
• Approved Vendor 7/16-20x1-1/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 27445 $1.57
• Approved Vendor 7/16-20x1-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27220 $1.34
• Approved Vendor 7/16-20x1-1/4" Stainless Steel Hex Cap Screws Bolts SKU 1342 $2.10
• Approved Vendor 7/16-20x1-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1344 $2.74
• Approved Vendor 7/16-20x2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27448 $1.98
• Approved Vendor 7/16-20x2" Stainless Steel Hex Cap Screws Bolts SKU 1345 $3.08
• Approved Vendor 7/16-20x2-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27350 $2.42
• Approved Vendor 7/16-20x2-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1347 $3.74
• Approved Vendor 7/16-20x2-1/4" Stainless Steel Hex Cap Screws Bolts SKU 1346 $3.44
• Approved Vendor 7/16-20x2-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1348 $4.05
• Approved Vendor 7/16-20x3" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 31614 $3.26
• Approved Vendor 7/16-20x3" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27379 $2.83
• Approved Vendor 7/16-20x3" Stainless Steel Hex Cap Screws Bolts SKU 1349 $4.45
• Approved Vendor 7/16-20x3-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1350 $5.16
• Approved Vendor 7/16-20x3-3/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 28988 $2.61
• Approved Vendor 7/16-20x3-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 31615 $4.02
• Approved Vendor 7/16-20x3/4" Stainless Steel Hex Cap Screws Bolts SKU 1340 $1.75
• Approved Vendor 7/16-20x4" Stainless Steel Hex Cap Screws Bolts SKU 1351 $5.85
• Approved Vendor 7/16-20x4-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 28987 $3.17

More in Fasteners

• Socket Head Screws
• Machine Screws
• Nuts
• Wood, Deck & Sheet Metal Screws
• Pins, Clips & Retaining Rings
• Carriage & Specialty Bolts
• Washers
• Anchors
• Threaded Rod & Studs
• Rivets