1‑1/4"-7 x 3‑1/2" Stainless Steel 304 B8 Heavy Hex Head Cap Screw, Full Thread, ASTM A193 Class 1

This 1‑1/4"-7 x 3‑1/2" full‑thread heavy hex head cap screw is manufactured from Type 304 stainless steel and conforms to ASTM A193 Grade B8, Class 1, making it a reliable fastening option for large‑diameter industrial and structural applications requiring corrosion resistance. The full‑thread (FT) design provides complete thread engagement across the entire shank, supporting consistent clamping force and flexibility in nut placement for thicker assemblies. The heavy hex head increases bearing surface and enhances wrenching leverage, allowing accurate torque application in high‑load installations. Commonly used in flanged joints, piping systems, pressure connections, and heavy equipment assemblies, this stainless fastener offers strong resistance to rust, oxidation, and environmental exposure, ensuring dependable long‑term performance in indoor, outdoor, and moderately corrosive environments.