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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
HH8BLK1250650 1 1/4-7 X 6 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 6 1/2
HH8BLK1250700 1 1/4-7 X 7 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 7
HH8BLK1250750 1 1/4-7 X 7 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 7 1/2
HH8BLK1250800 1 1/4-7 X 8 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 8
HH8BLK1250850 1 1/4-7 X 8 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 8 1/2
HH8BLK1250900 1 1/4-7 X 9 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 9
HH8BLK1250950 1 1/4-7 X 9 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 9 1/2
HH8BLK1251000 1 1/4-7 X 10 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 10
HH8BLK1251100 1 1/4-7 X 11 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 11
HH8BLK1251200 1 1/4-7 X 12 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 12
HH8BLK1251300 1 1/4-7 X 13 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 13
HH8BLK1251400 1 1/4-7 X 14 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/4 7 14
HH8BLK1500200 1 1/2-6 X 2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 2
HH8BLK1500250 1 1/2-6 X 2 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 2 1/2
HH8BLK1500300 1 1/2-6 X 3 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 3
HH8BLK1500350 1 1/2-6 X 3 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 3 1/2
HH8BLK1500400 1 1/2-6 X 4 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 4
HH8BLK1500450 1 1/2-6 X 4 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 4 1/2
HH8BLK1500500 1 1/2-6 X 5 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 5
HH8BLK1500550 1 1/2-6 X 5 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 5 1/2
HH8BLK1500600 1 1/2-6 X 6 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 6
HH8BLK1500650 1 1/2-6 X 6 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 6 1/2
HH8BLK1500700 1 1/2-6 X 7 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 7
HH8BLK1500750 1 1/2-6 X 7 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 7 1/2
HH8BLK1500800 1 1/2-6 X 8 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 8
HH8BLK1500850 1 1/2-6 X 8 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 8 1/2
HH8BLK1500900 1 1/2-6 X 9 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 9
HH8BLK1500950 1 1/2-6 X 9 1/2 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 9 1/2
HH8BLK1501000 1 1/2-6 X 10 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 10
HH8BLK1501100 1 1/2-6 X 11 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 11
HH8BLK1501200 1 1/2-6 X 12 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 12
HH8BLK1501300 1 1/2-6 X 13 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 13
HH8BLK1501400 1 1/2-6 X 14 GRADE 8 HEX HEAD CAP SCREW BLACK 1 1/2 6 14
HH8F0500075 1/2-20 X 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 3/4
HH8F0500100 1/2-20 X 1 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 1
HH8F0500125 1/2-20 X 1 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 1 1/4
HH8F0500150 1/2-20 X 1 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 1 1/2
HH8F0500175 1/2-20 X 1 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 1 3/4
HH8F0500200 1/2-20 X 2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 2
HH8F0500225 1/2-20 X 2 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 2 1/4
HH8F0500250 1/2-20 X 2 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 2 1/2
HH8F0500275 1/2-20 X 2 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 2 3/4
HH8F0500300 1/2-20 X 3 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 3
HH8F0500350 1/2-20 X 3 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 3 1/2
HH8F0500375 1/2-20 X 3 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 3 3/4
HH8F0500400 1/2-20 X 4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 4
HH8F0500425 1/2-20 X 4 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 4 1/4
HH8F0500450 1/2-20 X 4 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 4 1/2
HH8F0500475 1/2-20 X 4 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 4 3/4
HH8F0500500 1/2-20 X 5 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 20 5