7/8"-9 x 3‑1/2" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

This 7/8"-9 x 3‑1/2" heavy hex head cap screw is manufactured from Type 304 stainless steel and produced to ASTM A193 Grade B8, Class 1, providing dependable strength and corrosion resistance for heavy industrial fastening applications. The partial‑thread (PT) design incorporates an extended unthreaded shank that improves shear strength and ensures proper alignment in bolted joints, making it especially effective in flanged connections and thick structural assemblies. Its longer 3‑1/2" length supports deep engagement through substantial material sections, while the heavy hex head offers increased bearing surface and enhanced wrenching leverage for accurate torque control. Commonly used in piping systems, pressure connections, equipment bases, and structural steel installations, this fastener delivers reliable performance and long service life in indoor, outdoor, and moderately corrosive environments.