1‑1/4"-7 x 6‑1/2" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

This 1‑1/4"-7 x 6‑1/2" heavy hex head cap screw is manufactured from Type 304 stainless steel and complies with ASTM A193 Grade B8, Class 1, making it suitable for large‑diameter, extended‑length industrial and structural fastening where corrosion resistance and joint integrity are essential. The partial‑thread (PT) configuration features a long unthreaded shank that improves shear strength, supports accurate alignment, and enhances load transfer in high‑stress bolted connections such as flanged joints and thick structural assemblies. Its 6‑1/2" length allows secure fastening through substantial material sections, while the heavy hex head provides 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 delivers dependable resistance to rust, oxidation, and environmental exposure for long‑term performance in indoor, outdoor, and moderately corrosive environments.