1"-8 x 3‑1/2" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

This 1"-8 x 3‑1/2" heavy hex head cap screw is manufactured from 304 stainless steel and complies with ASTM A193 Grade B8, Class 1, providing dependable performance for heavy industrial and structural fastening applications. The partial‑thread (PT) configuration includes an unthreaded shank section that enhances shear strength and promotes proper load transfer in bolted joints, making it especially effective for flanged connections and thick structural assemblies. Its 3‑1/2" length allows secure engagement through substantial material stacks, while the heavy hex head delivers increased bearing surface and superior wrench contact for precise torque application. Commonly used in piping systems, pressure assemblies, equipment supports, and industrial fabrication, this stainless fastener offers strong resistance to rust, oxidation, and environmental exposure, ensuring long‑term reliability in indoor, outdoor, and moderately corrosive environments.