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

This 1‑1/2"-8 x 8" heavy hex head cap screw is manufactured from Type 304 stainless steel and conforms to ASTM A193 Grade B8, Class 1, making it suitable for very large‑diameter, high‑load industrial and structural fastening applications where corrosion resistance is essential. The partial‑thread (PT) configuration features a long, unthreaded shank that enhances shear strength, improves load transfer, and supports proper joint alignment in heavy flanged connections and thick structural assemblies. With its extended 8" length, this fastener is designed for deep engagement through substantial material stacks, while the heavy hex head provides a larger bearing surface and superior wrenching leverage for controlled, high‑torque installation. Commonly used in piping systems, pressure vessels, structural steel connections, and heavy equipment fabrication, this stainless cap screw delivers reliable resistance to rust, oxidation, and environmental exposure for long‑term performance in indoor, outdoor, and moderately corrosive environments.