1‑1/8"-7 x 5‑1/2" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

This 1‑1/8"-7 x 5‑1/2" heavy hex head cap screw is manufactured from Type 304 stainless steel and meets ASTM A193 Grade B8, Class 1 requirements, providing dependable strength and corrosion resistance for large‑diameter, extended‑reach industrial fastening applications. The partial‑thread (PT) design features a long unthreaded shank that enhances shear performance, promotes proper alignment, and improves load distribution in high‑stress bolted joints, particularly in flanged connections and thick structural assemblies. Its 5‑1/2" length supports secure fastening through substantial material sections, while the heavy hex head delivers increased bearing surface and superior wrench engagement for controlled, high‑torque installation. Commonly used in piping systems, pressure assemblies, structural steel connections, and heavy equipment fabrication, this fastener offers reliable resistance to rust, oxidation, and environmental exposure for long‑term service in indoor, outdoor, and moderately corrosive environments.