1‑1/8"-7 x 4‑1/2" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

This 1‑1/8"-7 x 4‑1/2" heavy hex head cap screw is manufactured from Type 304 stainless steel and produced to ASTM A193 Grade B8, Class 1, making it well suited for large‑diameter, high‑load industrial fastening applications where corrosion resistance is required. The partial‑thread (PT) design features an extended unthreaded shank that enhances shear strength, promotes proper joint alignment, and improves load transfer in thick or structural assemblies. Its 4‑1/2" length allows secure fastening through substantial material sections, while the heavy hex head provides increased bearing surface and superior wrench engagement for controlled torque during installation. Commonly used in piping systems, pressure assemblies, flanged connections, and heavy equipment fabrication, this fastener offers dependable resistance to rust, oxidation, and environmental exposure for long‑term service in indoor, outdoor, and moderately corrosive environments.