7/8"-9 x 3‑3/4" Stainless Steel 316 B8M Heavy Hex Head Cap Screw, Partial Thread, ASTM A193 Class 1

Manufactured from 316 stainless steel and produced to ASTM A193 Grade B8M, Class 1, the 7/8"-9 x 3‑3/4" heavy hex head cap screw is engineered for corrosion‑resistant fastening in high‑load industrial and structural applications. The partial‑thread (PT) design features an extended unthreaded shank that enhances shear strength and improves load distribution across stressed bolted joints, making it well suited for flanged connections and thick material assemblies. Its 3‑3/4" length provides increased grip for deeper engagement while maintaining proper alignment, and the heavy hex head offers greater bearing surface and improved wrench engagement for controlled, high‑torque installation. Commonly specified for marine environments, chemical processing equipment, pressure systems, and outdoor structural assemblies, this fastener delivers dependable performance and long service life in corrosive and moisture‑exposed conditions.