1‑1/2"-8 x 8" Stainless Steel 316 B8M Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

Manufactured from 316 stainless steel and certified to ASTM A193 Grade B8M, Class 1, the 1‑1/2"-8 x 8" heavy hex head cap screw is engineered for large‑diameter, high‑load industrial fastening applications where superior corrosion resistance is required. The partial‑thread (PT) design includes a long unthreaded shank that improves shear strength and promotes proper load distribution in heavily stressed bolted joints, making it ideal for thick flanged connections and structural assemblies. Its extended 8" length allows secure fastening through substantial material sections, while the heavy hex head provides increased bearing surface and enhanced wrenching leverage for controlled, high‑torque installation. Commonly specified for marine environments, chemical processing equipment, pressure systems, and outdoor structural applications, this fastener delivers dependable performance and long service life in corrosive and moisture‑exposed conditions.