1‑1/4"-8 x 6‑1/2" Stainless Steel 316 B8M Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

Manufactured from 316 stainless steel and meeting ASTM A193 Grade B8M, Class 1 requirements, the 1‑1/4"-8 x 6‑1/2" heavy hex head cap screw is designed for heavy‑duty industrial and structural fastening applications where superior corrosion resistance is essential. The partial‑thread (PT) configuration features a long unthreaded shank that improves shear strength and load transfer in high‑stress bolted joints, making it especially suitable for flanged connections and thick material assemblies. Its extended length allows secure engagement through substantial 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 assemblies, and outdoor structural applications, this fastener delivers dependable performance and long service life in corrosive and moisture‑exposed conditions.