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

Manufactured from 316 stainless steel and meeting ASTM A193 Grade B8M, Class 1 specifications, the 7/8"-9 x 3‑1/4" heavy hex head cap screw is engineered for corrosion‑resistant fastening in high‑load industrial and structural applications. The partial‑thread (PT) design incorporates an unthreaded shank section that enhances shear strength and improves load transfer across stressed bolted joints, making it well suited for flanged connections and thicker material assemblies. Its 3‑1/4" length provides added grip for deeper engagement while maintaining proper alignment, and the heavy hex head offers increased bearing surface and improved wrench engagement for precise, controlled torque application. 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.