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

This 1‑1/4"-8 x 7" heavy hex head cap screw is manufactured from Type 304 stainless steel and meets ASTM A193 Grade B8, Class 1 specifications, making it a reliable fastener for large‑diameter, long‑reach industrial and structural applications where corrosion resistance is required. The partial‑thread (PT) design features a long unthreaded shank that enhances shear strength, improves joint alignment, and supports efficient load transfer in high‑stress bolted connections such as flanged joints and thick structural assemblies. Its extended 7" 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 fabrication, and heavy machinery installations, this fastener delivers dependable resistance to rust, oxidation, and environmental exposure for long‑term service in indoor, outdoor, and moderately corrosive environments.