1‑1/8"-8 x 3‑1/2" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Full Thread, ASTM A193 Class 1

This 1‑1/8"-8 x 3‑1/2" full‑thread heavy hex head cap screw is manufactured from 304 stainless steel and produced to ASTM A193 Grade B8, Class 1, offering dependable corrosion resistance and mechanical strength for large‑diameter industrial fastening applications. The full‑thread configuration allows complete thread engagement over the entire shank length, supporting consistent clamp load and flexible nut positioning in high‑load assemblies. The heavy hex head provides increased bearing surface and improved wrenching leverage, making installation more controlled and secure in critical joints. Commonly used in flanged connections, piping systems, pressure equipment, and heavy machinery assemblies, this fastener resists rust, oxidation, and environmental exposure, delivering reliable long‑term performance in indoor, outdoor, and moderately corrosive service conditions.