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Grade 5 Bolts


High-Quality Grade 5 Bolts & Fasteners | U-Bolt-It

What is a Grade 5 Bolt?

Grade 5 bolts and fasteners are highly reliable structural components manufactured from medium-strength carbon steel. They are strictly specified under the standards set by the Society of Automotive Engineers (SAE). In the field, Grade 5 bolts can easily be identified by the three distinct radial marks stamped on the head of the bolt.

Technical Specifications and Equivalents

To ensure consistent strength and durability, our Grade 5 bolts are heat-treated in a controlled atmosphere. They are available in sizes ranging from ¼ inch through 1-½ inches in diameter. Key specifications include:

  • Minimum Tensile Strength (up to 1" diameter): 120,000 psi
  • Minimum Tensile Strength (over 1" to 1-½" diameter): 105,000 psi
  • Metric Equivalent: Grade 5 bolts are equivalent to Metric 8.8 bolts. When sourcing hardware, always be sure to match the grades on the bolts being used to maintain structural integrity.

Grade 5 vs. Grade 8 Bolts

While Grade 5 bolts offer exceptional strength for general commercial and industrial use, if your application calls for fastening heavier materials, you may need to upgrade to Grade 8 bolts. Grade 8 bolts are the hardest and strongest option available, making them the standard for extreme, heavy manufacturing applications. However, for standard load-bearing requirements, Grade 5 bolts are the perfect, cost-effective solution.

Available Custom Finishes

To provide additional protection against rust and environmental wear, each Grade 5 bolt from U-Bolt-It is available in a high-quality zinc-plated finish.

Request a Quote Today

Have a question about our manufactured Grade 5 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 5 Bolts


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SKU NAME DIAMETER THREAD LENGTH DETAILS
HH5F0620450 5/8-18 X 4 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 4 1/2
HH5F0620475 5/8-18 X 4 3/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 4 3/4
HH5F0620500 5/8-18 X 5 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 5
HH5F0620550 5/8-18 X 5 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 5 1/2
HH5F0620600 5/8-18 X 6 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 6
HH5F0620650 5/8-18 X 6 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 6 1/2
HH5F0620700 5/8-18 X 7 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 7
HH5F0620750 5/8-18 X 7 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 7 1/2
HH5F0620800 5/8-18 X 8 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 8
HH5F0620850 5/8-18 X 8 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 8 1/2
HH5F0620900 5/8-18 X 9 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 9
HH5F0620950 5/8-18 X 9 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 9 1/2
HH5F0621000 5/8-18 X 10 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 10
HH5F0621100 5/8-18 X 11 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 11
HH5F0621200 5/8-18 X 12 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 12
HH5F0621300 5/8-18 X 13 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 13
HH5F0621400 5/8-18 X 14 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 14
HH5F0621500 5/8-18 X 15 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 18 15
HH50310050 5/16-18 X 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 1/2
HH50310062 5/16-18 X 5/8 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 5/8
HH50310075 5/16-18 X 3/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 3/4
HH50310087 5/16-18 X 7/8 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 7/8
HH50310100 5/16-18 X 1 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 1
HH50310125 5/16-18 X 1 1/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 1 1/4
HH50310150 5/16-18 X 1 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 1 1/2
HH50310175 5/16-18 X 1 3/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 1 3/4
HH50310200 5/16-18 X 2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 2
HH50310225 5/16-18 X 2 1/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 2 1/4
HH50310250 5/16-18 X 2 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 2 1/2
HH50310275 5/16-18 X 2 3/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 2 3/4
HH50310300 5/16-18 X 3 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 3
HH50310325 5/16-18 X 3 1/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 3 1/4
HH50310350 5/16-18 X 3 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 3 1/2
HH50310375 5/16-18 X 3 3/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 3 3/4
HH50310400 5/16-18 X 4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 4
HH50310425 5/16-18 X 4 1/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 4 1/4
HH50310450 5/16-18 X 4 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 4 1/2
HH50310475 5/16-18 X 4 3/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 4 3/4
HH50310500 5/16-18 X 5 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 5
HH50310525 5/16-18 X 5 1/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 5 1/4
HH50310550 5/16-18 X 5 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 5 1/2
HH50310575 5/16-18 X 5 3/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 5 3/4
HH50310600 5/16-18 X 6 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 6
HH50310650 5/16-18 X 6 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 6 1/2
HH50310700 5/16-18 X 7 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 7
HH50310750 5/16-18 X 7 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 7 1/2
HH50310800 5/16-18 X 8 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/16 18 8
HH50620100 5/8-11 X 1 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 11 6
HH50620125 5/8-11 X 1 1/4 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 11 1
HH50620150 5/8-11 X 1 1/2 GRADE 5 HEX HEAD CAP SCREW ZINC PLATED 5/8 11 1 1/4