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High-Quality Grade 8 Bolts and Fasteners


High-Quality Grade 8 Bolts & Fasteners | U-Bolt-It

What is a Grade 8 Bolt?

Grade 8 bolts and fasteners are generally the most durable and reliable hardware available for extreme, heavy-duty structural applications. They are comprised of high-strength carbon-alloy steel and are heat-treated in a carbon-controlled atmosphere to achieve superior hardness. Designed for securing heavy loads and thick structural materials, Grade 8 bolts boast the highest ratings in their class, featuring an impressive minimum tensile strength of 150,000 psi.

Common Industry Applications

Because of their unmatched strength and durability, Grade 8 bolts are exclusively used in harsh environments where extreme stress, high vibration, and strong load-bearing pressure are required. Common industries and applications include:

  • Marine and shipbuilding industries
  • Military and defense equipment
  • Aerospace and aviation manufacturing
  • Off-road vehicle markets and heavy machinery
  • Related high-stress mechanical and structural applications

Request a Quote Today

Have a question about our manufactured Grade 8 bolts? Contact our team directly by phone or by using our secure online form. You can also give us a call today to speak directly with our fastener specialists. We look forward to speaking with you!

Types of Grade 8 Bolts


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SKU NAME DIAMETER THREAD LENGTH DETAILS
HH8F0310200 5/16-24 X 2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 2
HH8F0310225 5/16-24 X 2 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 2 1/4
HH8F0310250 5/16-24 X 2 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 2 1/2
HH8F0310275 5/16-18 X 2 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 2 3/4
HH8F0310300 5/16-24 X 3 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 3
HH8F0310325 5/16-24 X 3 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 3 1/4
HH8F0310350 5/16-24 X 3 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 3 1/2
HH8F0310375 5/16-24 X 3 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 3 3/4
HH8F0310400 5/16-24 X 4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 4
HH8F0310450 5/16-24 X 4 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 4 1/2
HH8F0310500 5/16-24 X 5 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 5
HH8F0310550 5/16-24 X 5 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 5 1/2
HH8F0310600 5/16-24 X 6 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 6
HH8F0310650 5/16-24 X 6 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 6 1/2
HH8F0310700 5/16-24 X 7 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 7
HH8F0310750 5/16-24 X 7 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 7 1/2
HH8F0310800 5/16-24 X 8 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/16 24 8
HH8F0620100 5/8-18 X 1 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 1
HH8F0620125 5/8-18 X 1 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 1 1/4
HH8F0620150 5/8-18 X 1 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 1 1/2
HH8F0620175 5/8-18 X 1 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 1 3/4
HH8F0620200 5/8-18 X 2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 2
HH8F0620225 5/8-18 X 2 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 2 1/4
HH8F0620250 5/8-18 X 2 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 2 1/2
HH8F0620275 5/8-18 X 2 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 2 3/4
HH8F0620300 5/8-18 X 3 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 3
HH8F0620325 5/8-18 X 3 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 3 1/4
HH8F0620350 5/8-18 X 3 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 3 1/2
HH8F0620375 5/8-18 X 3 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 3 3/4
HH8F0620400 5/8-18 X 4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 4
HH8F0620425 5/8-18 X 4 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 4 1/4
HH8F0620450 5/8-18 X 4 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 4 1/2
HH8F0620475 5/8-18 X 4 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 4 3/4
HH8F0620500 5/8-18 X 5 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 5
HH8F0620550 5/8-18 X 5 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 5 1/2
HH8F0620600 5/8-18 X 6 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 6
HH8F0620650 5/8-18 X 6 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 6 1/2
HH8F0620750 5/8-18 X 7 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 7 1/2
HH8F0620800 5/8-18 X 8 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 8
HH8F0620850 5/8-18 X 8 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 8 1/2
HH8F0620900 5/8-18 X 9 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 9
HH8F0620950 5/8-18 X 9 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 9 1/2
HH8F0621000 5/8-18 X 10 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 10
HH8F0621100 5/8-18 X 11 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 11
HH8F0621200 5/8-18 X 12 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 12
HH8F0621300 5/8-18 X 13 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 13
HH8F0621400 5/8-18 X 14 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 14
HH8F0621500 5/8-18 X 15 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 5/8 18 15
HH8BLK0310050 5/16-18 X 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 5/16 18 1/2
HH8BLK0310062 5/16-18 X 5/8 GRADE 8 HEX HEAD CAP SCREW BLACK 5/16 18 5/8