S-92198A387 7/8"-9 x 3 1/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and reducing maintenance costs
• Exceptional tensile strength of 80,000 psi ensures reliable performance under high-stress conditions and prevents fastener failure
• Coarse UNC threads provide faster installation and better resistance to vibration loosening in heavy machinery
• Class 2A thread fit guarantees consistent, easy assembly while maintaining secure connections in industrial applications
• External hex drive design allows for high torque application with standard tools, speeding up installation and maintenance
• Partial threading offers unthreaded shank strength where needed, optimizing clamp load distribution
• Full compliance with ASME B18.2.1, RoHS 3, and REACH ensures material safety and meets rigorous industrial standards

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this 7/8"-9 UNC hex head screw delivers critical reliability where failure is not an option. The 18-8 stainless steel composition provides inherent corrosion resistance, making it ideal for chemical processing, marine applications, and outdoor infrastructure where moisture and corrosive elements are constant challenges. The coarse thread design ensures rapid installation in structural steel connections, heavy equipment assembly, and construction projects where time efficiency is paramount. With 80,000 psi tensile strength and Rockwell B70 hardness, it maintains integrity under extreme vibration and load conditions common in mining equipment, transportation infrastructure, and industrial machinery. The external hex drive accommodates high-torque applications, while partial threading provides optimal stress distribution in bolted joints requiring precise clamp load management.

Specification Summary & Compliance

This hex head screw features precise Class 2A thread fit per UNC standards with 7/8"-9 coarse thread configuration and minimum 2" thread length. Manufactured to ASME B18.2.1 specifications for dimensional accuracy and performance reliability. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions adherence for global industrial applications.