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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
HH8F0250150 1/4-28 X 1 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 1 1/2
HH8F0250175 1/4-28 X 1 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 1 3/4
HH8F0250200 1/4-28 X 2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 2
HH8F0250225 1/4-28 X 2 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 2 1/4
HH8F0250250 1/4-28 X 2 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 2 1/2
HH8F0250275 1/4-28 X 2 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 2 3/4
HH8F0250300 1/4-28 X 3 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 3
HH8F0250325 1/4-28 X 3 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 3 1/4
HH8F0250350 1/4-28 X 3 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 3 1/2
HH8F0250375 1/4-28 X 3 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 3 3/4
HH8F0250400 1/4-28 X 4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 4
HH8F0250450 1/4-28 X 4 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 4 1/2
HH8F0250500 1/4-28 X 5 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 5
HH8F0250550 1/4-28 X 5 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 5 1/2
HH8F0250600 1/4-28 X 6 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 6
HH8F0250700 1/4-28 X 7 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 7
HH8F0250800 1/4-28 X 8 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 8
HH8BLK1000150 1-8 X 1 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 1 1/2
HH8BLK1000175 1-8 X 1 3/4 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 1 3/4
HH8BLK1000200 1-8 X 2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 2
HH8BLK1000225 1-8 X 2 1/4 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 2 1/4
HH8BLK1000250 1-8 X 2 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 2 1/2
HH8BLK1000275 1-8 X 2 3/4 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 2 3/4
HH8BLK1000300 1-8 X 3 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 3
HH8BLK1000325 1-8 X 3 1/4 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 3 1/4
HH8BLK1000350 1-8 X 3 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 3 1/2
HH8BLK1000375 1-8 X 3 3/4 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 3 3/4
HH8BLK1000400 1-8 X 4 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 4
HH8BLK1000450 1-8 X 4 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 4 1/2
HH8BLK1000500 1-8 X 5 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 5
HH8BLK1000550 1-8 X 5 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 5 1/2
HH8BLK1000600 1-8 X 6 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 6
HH8BLK1000650 1-8 X 6 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 6 1/2
HH8BLK1000700 1-8 X 7 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 7
HH8BLK1000750 1-8 X 7 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 7 1/2
HH8BLK1000800 1-8 X 8 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 8
HH8BLK1000850 1-8 X 8 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 8 1/2
HH8BLK1000900 1-8 X 9 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 9
HH8BLK1000950 1-8 X 9 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 9 1/2
HH8BLK1001000 1-8 X 10 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 10
HH8BLK1001200 1-8 X 12 GRADE 8 HEX HEAD CAP SCREW BLACK 1 8 12
HH8BLK1250200 1 1/4-7 X 2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 2
HH8BLK1250250 1 1/4-7 X 2 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 2 1/2
HH8BLK1250300 1 1/4-7 X 3 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 3
HH8BLK1250350 1 1/4-7 X 3 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 3 1/2
HH8BLK1250400 1 1/4-7 X 4 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 4
HH8BLK1250450 1 1/4-7 X 4 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 4 1/2
HH8BLK1250500 1 1/4-7 X 5 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 5
HH8BLK1250550 1 1/4-7 X 5 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 5 1/2
HH8BLK1250600 1 1/4-7 X 6 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 6