1‑1/4"-8 x 6" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

This 1‑1/4"-8 x 6" heavy hex head cap screw is manufactured from Type 304 stainless steel and conforms to ASTM A193 Grade B8, Class 1, making it a dependable fastener for large‑diameter, extended‑length industrial and structural applications where corrosion resistance is essential. The partial‑thread (PT) design provides a long, unthreaded shank that improves shear strength, supports accurate alignment, and enhances load transfer in high‑stress bolted joints, particularly in flanged connections and thick structural assemblies. The extended 6" length allows secure fastening through substantial material stacks, while the heavy hex head offers increased bearing surface and strong wrench engagement for controlled, high‑torque installation. Commonly specified for piping systems, pressure equipment, structural steel fabrication, and heavy machinery installations, this fastener delivers reliable resistance to rust, oxidation, and environmental exposure for long‑term service in indoor, outdoor, and moderately corrosive environments.