1‑1/4"-7 x 3‑1/2" Stainless Steel 316 B8M Heavy Hex Head Cap Screw, Full Thread, ASTM A193 Class 1

Manufactured from 316 stainless steel and compliant with ASTM A193 Grade B8M, Class 1, the 1‑1/4"-7 x 3‑1/2" heavy hex head cap screw is designed for corrosion‑resistant fastening in high‑load industrial and structural applications. The full‑thread (FT) configuration provides continuous thread engagement along the entire shank, supporting uniform clamping force and reliable joint integrity in assemblies requiring consistent load distribution. 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 dependable performance and long service life in corrosive and moisture‑exposed conditions.