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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
HH81120950 1 1/8-7 X 9 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/8 7 9.5
HH81121000 1 1/8-7 X 10 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/8 7 10
HH81121100 1 1/8-7 X 11 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/8 7 11
HH81121300 1 1/8-7 X 13 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/8 7 13
HH81121400 1 1/8-7 X 14 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/8 7 14
HH81250250 1 1/4-7 X 2 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 2.5
HH81250300 1 1/4-7 X 3 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 3
HH81250350 1 1/4-7 X 3 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 3.5
HH81250400 1 1/4-7 X 4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 4
HH81250450 1 1/4-7 X 4 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 4.5
HH81250500 1 1/4-7 X 5 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 5
HH81250550 1 1/4-7 X 5 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 5.5
HH81250600 1 1/4-7 X 6 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 6
HH81250700 1 1/4-7 X 7 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 7
HH81250750 1 1/4-7 X 7 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 7.5
HH81250800 1 1/4-7 X 8 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 8
HH81250850 1 1/4-7 X 8 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 8.5
HH81250900 1 1/4-7 X 9 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 9
HH81250950 1 1/4-7 X 9 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 9.5
HH81251100 1 1/4-7 X 11 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 11
HH81251200 1 1/4-7 X 12 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 12
HH81251300 1 1/4-7 X 13 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 13
HH81251400 1 1/4-7 X 14 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/4 7 14
HH81500200 1 1/2-6 X 2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 2
HH81500250 1 1/2-6 X 2 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 2.5
HH81500300 1 1/2-6 X 3 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 3
HH81500350 1 1/2-6 X 3 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 3.5
HH81500400 1 1/2-6 X 4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 4
HH81500450 1 1/2-6 X 4 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 4.5
HH81500500 1 1/2-6 X 5 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 5
HH81500550 1 1/2-6 X 5 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 5.5
HH81500600 1 1/2-6 X 6 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 6
HH81500650 1 1/2-6 X 6 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 6.5
HH81500700 1 1/2-6 X 7 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 7
HH81500750 1 1/2-6 X 7 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 7.5
HH81500800 1 1/2-6 X 8 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 8
HH81500850 1 1/2-6 X 8 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 8.5
HH81500900 1 1/2-6 X 9 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 9
HH81501100 1 1/2-6 X 11 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 11
HH81501200 1 1/2-6 X 12 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 12
HH81501300 1 1/2-6 X 13 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 13
HH81501400 1 1/2-6 X 14 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 14
HH81501800 1 1/2-6 X 18 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 18
HH81502200 1 1/2-6 X 22 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1 1/2 6 22
HH8F0250050 1/4-28 X 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 1/2
HH8F0250062 1/4-28 X 5/8 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 5/8
HH8F0250075 1/4-28 X 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 3/4
HH8F0250087 1/4-28 X 7/8 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 7/8
HH8F0250100 1/4-28 X 1 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 1
HH8F0250125 1/4-28 X 1 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 28 1 1/4