Grade 5 Bolts

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!