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

This 1‑1/4"-8 x 3" full‑thread heavy hex head cap screw is manufactured from 304 stainless steel and produced to ASTM A193 Grade B8, Class 1, providing dependable mechanical strength and corrosion resistance for large‑diameter industrial fastening applications. The full‑thread (FT) design allows continuous thread engagement along the entire shank, supporting consistent clamp load and flexible nut positioning in high‑load assemblies. The heavy hex head offers increased bearing surface and improved wrench contact, allowing accurate torque control during installation. Commonly used in piping systems, flanged joints, pressure equipment, and heavy machinery assemblies, this stainless fastener resists rust, oxidation, and environmental exposure, delivering reliable long‑term performance in indoor, outdoor, and moderately corrosive service conditions.