Heavy Hex Bolts

Heavy hex bolts are externally threaded fasteners with an oversized hex head designed to spread clamping force over a wider area. That larger bearing surface helps reduce joint damage, resist loosening, and improve reliability in high-load, high-pressure, and high-temperature assemblies.

Because heavy hex bolting is often specified job-by-job, selection depends on your exact grade, finish, dimensions, and service conditions. American Bolt Corp stocks heavy hex bolts in common ASTM grades and coatings, but availability and pricing are always project-specific. Reach out with your specs and we’ll quote the correct match.

Common materials include A193-B7, A193-B8, A193-B8M, A307 Grade B in plain, zinc, hot-dip galvanized, or teflon finishes.