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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
HH80751000 3/4-10 X 10 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 3/4 10 10
HH80751100 3/4-10 X 11 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 3/4 10 11
HH80751300 3/4-10 X 13 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 3/4 10 13
HH80751400 3/4-10 X 14 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 3/4 10 14
HH80751500 3/4-10 X 15 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 3/4 10 15
HH80250050 1/4-20 X 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 1/2
HH80250062 1/4-20 X 5/8 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 5/8
HH80250075 1/4-20 X 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 3/4
HH80250087 1/4-20 X 7/8 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 7/8
HH80250100 1/4-20 X 1 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 1
HH80250125 1/4-20 X 1 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 1 1/4
HH80250150 1/4-20 X 1 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 1 1/2
HH80250175 1/4-20 X 1 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 1 3/4
HH80250200 1/4-20 X 2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 2
HH80250225 1/4-20 X 2 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 2 1/4
HH80250250 1/4-20 X 2 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 2 1/2
HH80250275 1/4-20 X 2 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 2 3/4
HH80250300 1/4-20 X 3 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 3
HH80250325 1/4-20 X 3 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 3 1/4
HH80250350 1/4-20 X 3 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 3 1/2
HH80250375 1/4-20 X 3 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 3 3/4
HH80250400 1/4-20 X 4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 4
HH80250450 1/4-20 X 4 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 4 1/2
HH80250500 1/4-20 X 5 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 5
HH80250550 1/4-20 X 5 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 5 1/2
HH80250575 1/4-20 X 5 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 5 3/4
HH80250600 1/4-20 X 6 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 6
HH80250700 1/4-20 X 7 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 7
HH80250800 1/4-20 X 8 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/4 20 8
HH80500075 1/2-13 X 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 3/4
HH80500100 1/2-13 X 1 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 1
HH80500125 1/2-13 X 1 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 1 1/4
HH80500150 1/2-13 X 1 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 1 1/2
HH80500175 1/2-13 X 1 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 1 3/4
HH80500200 1/2-13 X 2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 2
HH80500225 1/2-13 X 2 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 2 1/4
HH80500250 1/2-13 X 2 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 2 1/2
HH80500275 1/2-13 X 2 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 2 3/4
HH80500300 1/2-13 X 3 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 3
HH80500325 1/2-13 X 3 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 3 1/4
HH80500350 1/2-13 X 3 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 3 1/2
HH80500375 1/2-13 X 3 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 3 3/4
HH80500400 1/2-13 X 4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 4
HH80500425 1/2-13 X 4 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 4 1/4
HH80500450 1/2-13 X 4 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 4 1/2
HH80500475 1/2-13 X 4 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 4 3/4
HH80500500 1/2-13 X 5 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 5
HH80500525 1/2-13 X 5 1/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 5 1/4
HH80500550 1/2-13 X 5 1/2 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 5 1/2
HH80500575 1/2-13 X 5 3/4 GRADE 8 HEX HEAD CAP SCREW YELLOW ZINC 1/2 13 5 3/4