S-92655A665 7/8"-9 x 1 1/2" ASTM A193 18-8 Stainless Steel Heavy Hex Head Screws for High-Pressure Applications

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and reducing maintenance costs
• High tensile strength of 75,000 psi ensures reliable performance in heavy-duty applications and prevents fastener failure
• Excellent hardness (Rockwell B96) provides outstanding wear resistance and extends service life under repetitive stress
• Coarse UNC threads enable faster installation and better grip in softer materials or where vibration is a concern
• Class 2A thread fit offers consistent, easy assembly while maintaining secure fastening without binding
• External hex drive design allows for high-torque application with standard tools, speeding up assembly and disassembly
• Full threading along the 1-1/2" length ensures maximum adjustability and uniform load distribution across the entire fastener

Professional Applications & Engineering Value

These 7/8"-9 UNC hex head screws are engineered to address critical challenges in industrial applications where corrosion resistance and high strength are non-negotiable. Made from 18-8 Stainless Steel and meeting ASTM A193 Grade B8 specifications, they prevent rust and degradation in chemical processing, marine, or outdoor settings. The coarse thread design reduces cross-threading risks and provides superior holding power in assemblies subject to vibration or thermal cycling. With a fully threaded shank and external hex drive, these screws enable precise tension control and easy access in confined spaces, making them ideal for structural connections, heavy machinery, and pressure vessel systems requiring dependable, long-term performance.

Specification Summary & Compliance

This fastener features a 7/8"-9 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy. It complies with ASTM A193 Grade B8 specifications, ensuring material and manufacturing consistency for high-temperature and pressure applications. The product is manufactured in accordance with industry standards for inch system fasteners and is suitable for use in environments requiring robust mechanical properties and corrosion resistance.