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.
Popular hex bolts & cap screws
- Approved Vendor #10-24x1" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 7035 $0.31
- Approved Vendor #10-24x1/2" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 7130 $0.18
- Approved Vendor #10-24x3/4" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 7225 $0.21
- Approved Vendor #10-24x3/8" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 7265 $0.16
- Approved Vendor #10-24x5/8" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 7311 $0.20
- Approved Vendor #6-32x1" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 10412 $0.14
- Approved Vendor #6-32x1/2" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 10477 $0.12
- Approved Vendor #6-32x1/4" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 10512 $0.20
- Approved Vendor #6-32x3/4" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 10569 $0.12
- Approved Vendor #6-32x3/8" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 10603 $0.10
- Approved Vendor #6-32x5/8" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 10647 $0.12
- Approved Vendor #6-32x7/8" Grade 5 Serrated Hex Flange Bolts Zinc Clear SKU 10672 $0.14
- Approved Vendor 1-8x1-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1269 $18.27
- Approved Vendor 1-8x1-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13665 $12.76
- Approved Vendor 1-8x1-3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13666 $13.67
- Approved Vendor 1-8x1-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1270 $14.24
- Approved Vendor 1-8x10" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13667 $46.42
- Approved Vendor 1-8x2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13671 $13.34
- Approved Vendor 1-8x2" Stainless Steel Hex Cap Screws Bolts SKU 1271 $11.33
- Approved Vendor 1-8x2-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13673 $14.47
- Approved Vendor 1-8x2-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1272 $12.28
- Approved Vendor 1-8x2-1/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13675 $14.84
- Approved Vendor 1-8x2-3/4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13677 $16.28
- Approved Vendor 1-8x2-3/4" Stainless Steel Hex Cap Screws Bolts SKU 1273 $12.82
- Approved Vendor 1-8x3" Stainless Steel Hex Cap Screws Bolts SKU 1274 $13.61
- Approved Vendor 1-8x3" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13679 $16.45
- Approved Vendor 1-8x3-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13681 $18.48
- Approved Vendor 1-8x4" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13683 $20.31
- Approved Vendor 1-8x4" Stainless Steel Hex Cap Screws Bolts SKU 1276 $17.62
- Approved Vendor 1-8x4-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13685 $16.80
- Approved Vendor 1-8x5" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13687 $18.45
- Approved Vendor 1-8x5" Stainless Steel Hex Cap Screws Bolts SKU 1278 $21.50
- Approved Vendor 1-8x5-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13689 $20.78
- Approved Vendor 1-8x5-1/2" Stainless Steel Hex Cap Screws Bolts SKU 1279 $23.17
- Approved Vendor 1-8x6" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13691 $21.19
- Approved Vendor 1-8x6" Stainless Steel Hex Cap Screws Bolts SKU 1280 $25.54
- Approved Vendor 1-8x7" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13693 $24.08
- Approved Vendor 1-8x7" Stainless Steel Hex Cap Screws Bolts SKU 1281 $31.57
- Approved Vendor 1-8x8" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13694 $27.48
- Approved Vendor 1-8x8" Stainless Steel Hex Cap Screws Bolts SKU 1282 $34.94
- Approved Vendor 1-8x9" Hex Head Cap Screws Grade 8 Zinc Yellow SKU 13695 $37.28
- Approved Vendor 1/2"-13 Coarse 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 249 PCS SKU 14758 $156.17/pack of 249
- Approved Vendor 1/2"-13 Coarse 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 496 PCS SKU 14759 $187.65/pack of 496
- Approved Vendor 1/2"-13 Coarse 18-8 Stainless Steel Hex Cap Screws, Nuts, & Washers - 497 PCS SKU 14760 $246.80/pack of 497
- Approved Vendor 1/2"-13 Coarse Grade 5 Hex Cap Screws, Nuts, & Washers - 249 PCS SKU 14761 $108.55/pack of 249
- Approved Vendor 1/2"-13 Coarse Grade 5 Hex Cap Screws, Nuts, & Washers - 496 PCS SKU 14762 $109.72/pack of 496
- Approved Vendor 1/2"-13 Coarse Grade 5 Hex Cap Screws, Nuts, & Washers - 497 PCS SKU 14763 $168.87/pack of 497
- Approved Vendor 1/2"-13 Coarse Grade 8 Hex Cap Screws, Nuts, & Washers - 249 PCS SKU 14764 $128.44/pack of 249