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 30

Approved Vendor 7/16-20x5" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 28986 $3.59
Approved Vendor 7/16-20x6" Stainless Steel Hex Cap Screws Bolts SKU 1355 $8.63
Approved Vendor 7/16-20x7/8" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 29058 $0.88
Approved Vendor 7/8-14x2" Stainless Steel Hex Cap Screws Bolts SKU 1415 $16.14
Approved Vendor 7/8-14x2-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1416 $18.52
Approved Vendor 7/8-14x2-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 28972 $12.47
Approved Vendor 7/8-14x3" Stainless Steel Hex Cap Screws Bolts SKU 1417 $21.60
Approved Vendor 7/8-14x3-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1418 $24.08
Approved Vendor 7/8-14x4"Stainless Steel Hex Cap Screws Bolts SKU 1419 $27.40
Approved Vendor 7/8-14x4-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 30952 $19.64
Approved Vendor 7/8-14x4-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1420 $29.02
Approved Vendor 7/8-14x5" Stainless Steel Hex Cap Screws Bolts SKU 1421 $31.49
Approved Vendor 7/8-14x5" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 28971 $20.51
Approved Vendor 7/8-14x5-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 30953 $23.16
Approved Vendor 7/8-14x5-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1422 $33.97
Approved Vendor 7/8-14x6" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 28970 $25.09
Approved Vendor 7/8-14x6" Stainless Steel Hex Cap Screws Bolts SKU 1423 $36.44
Approved Vendor 7/8-9x2" Stainless Steel Hex Cap Screws Bolts SKU 1258 $10.03
Approved Vendor 7/8-9x2-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1259 $11.23
Approved Vendor 7/8-9x2-1/4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 28978 $6.26
Approved Vendor 7/8-9x3" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 30944 $7.43
Approved Vendor 7/8-9x3" Stainless Steel Hex Cap Screws Bolts SKU 1260 $10.00
Approved Vendor 7/8-9x3-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1261 $11.15
Approved Vendor 7/8-9x4" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 30948 $8.87
Approved Vendor 7/8-9x5" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 30945 $10.94
Approved Vendor 7/8-9x5-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 30950 $19.97
Approved Vendor 7/8-9x6" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 30947 $13.08
Approved Vendor 7/8-9x7" Stainless Steel Hex Cap Screws Bolts SKU 1267 $22.29
Approved Vendor 7/8-9x7" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 30946 $15.75
Approved Vendor 9/16"-12x1" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 30957 $6.15
Approved Vendor 9/16"-12x1-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 30958 $7.54
Approved Vendor 9/16"-12x2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 30959 $9.35
Approved Vendor 9/16"-12x2-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 30960 $11.22
Approved Vendor 9/16"-12x3" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 30961 $13.07
Approved Vendor 9/16"-12x3-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 30962 $14.93
Approved Vendor 9/16"-12x4" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 30963 $16.81
Approved Vendor 9/16"-18x1-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 28960 $8.16
Approved Vendor 9/16"-18x2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 30964 $9.99
Approved Vendor 9/16"-18x2-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 28959 $12.29
Approved Vendor 9/16"-18x3" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 30965 $14.14
Approved Vendor 9/16"-18x3-1/2" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 30966 $16.10
Approved Vendor 9/16"-18x4" Hex Cap Screws Grade L-9 Bolts USA Zinc Yellow SKU 30967 $17.97
Approved Vendor 9/16-12x1" Stainless Steel Hex Cap Screws Bolts SKU 1208 $3.11
Approved Vendor 9/16-12x1-1/2" Hex Cap Screws Grade 5 Bolts Zinc Clear SKU 27409 $1.95
Approved Vendor 9/16-12x1-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 27257 $2.68
Approved Vendor 9/16-12x1-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1210 $3.87
Approved Vendor 9/16-12x1-1/4" Stainless Steel Hex Cap Screws Bolts SKU 1209 $3.51
Approved Vendor 9/16-12x1-3/4" Hex Head Cap Screws Grade 8 USA Zinc Yellow SKU 28969 $3.52

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