7/8"-9 x 4‑1/2" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

This 7/8"-9 x 4‑1/2" heavy hex head cap screw is manufactured from Type 304 stainless steel and meets ASTM A193 Grade B8, Class 1 specifications, providing dependable strength and corrosion resistance for heavy industrial fastening requirements. The partial‑thread (PT) design includes an extended unthreaded shank that improves shear performance and maintains proper alignment in bolted joints, making it especially effective for flanged connections, structural assemblies, and thick material stacks. The longer 4‑1/2" length allows secure engagement through substantial components, while the heavy hex head delivers increased bearing surface and enhanced wrenching leverage for accurate torque application. Commonly used in piping systems, pressure connections, equipment supports, and industrial fabrication, this fastener offers reliable resistance to rust, oxidation, and environmental exposure for long‑term service in indoor, outdoor, and moderately corrosive environments.