7/8"-9 x 3‑3/4" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

This 7/8"-9 x 3‑3/4" heavy hex head cap screw is manufactured from 304 stainless steel and complies with ASTM A193 Grade B8, Class 1, making it a reliable fastening solution for heavy industrial and structural applications requiring corrosion resistance. The partial‑thread (PT) design features an extended unthreaded shank that improves shear strength and promotes accurate alignment in bolted joints, particularly in flanged connections and thick structural assemblies. The longer 3‑3/4" length supports secure fastening through substantial material sections, while the heavy hex head provides increased bearing surface and enhanced wrench engagement for precise torque control. Commonly used in piping systems, pressure assemblies, equipment supports, and structural steel fabrication, this fastener delivers dependable resistance to rust, oxidation, and environmental exposure, ensuring long service life in indoor, outdoor, and moderately corrosive environments.