1‑1/4"-8 x 5" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

This 1‑1/4"-8 x 5" heavy hex head cap screw is manufactured from Type 304 stainless steel and meets ASTM A193 Grade B8, Class 1 requirements, providing dependable corrosion resistance and strength for large‑diameter industrial fastening applications. The partial‑thread (PT) design features an extended unthreaded shank that enhances shear capacity, improves joint alignment, and supports proper load transfer in high‑stress bolted connections such as flanges and thick structural assemblies. Its 5" length allows secure fastening through substantial material stacks, while the heavy hex head delivers increased bearing surface and strong wrench engagement for controlled, high‑torque installation. Commonly used in piping systems, pressure assemblies, structural steel fabrication, and heavy equipment installations, this fastener offers reliable resistance to rust, oxidation, and environmental exposure for long‑term service in indoor, outdoor, and moderately corrosive environments.