1‑1/8"-8 x 6‑1/2" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

This 1‑1/8"-8 x 6‑1/2" heavy hex head cap screw is manufactured from Type 304 stainless steel and produced to ASTM A193 Grade B8, Class 1, making it suitable for large‑diameter, extended‑length industrial and structural fastening applications requiring corrosion resistance. The partial‑thread (PT) design features a long, unthreaded shank that improves shear strength, supports accurate alignment, and ensures proper load transfer in high‑stress bolted joints, particularly in flanged connections and thick structural assemblies. Its 6‑1/2" length allows secure fastening through substantial material stacks, while the heavy hex head provides increased bearing surface and strong wrench engagement for controlled, high‑torque installation. Commonly used in piping systems, pressure equipment, structural steel connections, and heavy fabrication, this fastener offers reliable resistance to rust, oxidation, and environmental exposure for long‑term service in indoor, outdoor, and moderately corrosive environments.