1"-8 x 3" Stainless Steel 316 B8M Heavy Hex Head Cap Screw, Full Thread, ASTM A193 Class 1

Manufactured from 316 stainless steel and certified to ASTM A193 Grade B8M, Class 1, the 1"-8 x 3" heavy hex head cap screw is designed for corrosion‑resistant fastening in industrial and structural applications requiring high strength and durability. The full‑thread (FT) configuration provides complete thread engagement along the entire shank, ensuring consistent clamping force and dependable joint integrity in medium‑to‑heavy duty assemblies. The heavy hex head offers increased bearing surface and improved wrench engagement compared to standard hex heads, allowing precise torque control during installation. Commonly specified for marine environments, chemical processing equipment, pressure systems, and outdoor structural assemblies, this fastener delivers reliable performance and long service life in corrosive and moisture‑exposed conditions.