S-93190A887 7/8"-9 x 4" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments including marine and chemical applications
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads
• Optimized assembly efficiency through Class 2A coarse UNC threads and full threading for faster installation and secure fastening
• Robust drive engagement with external hex drive and large 1 5/16" head width for high-torque application without stripping
• Long-term durability in demanding conditions thanks to coarse thread spacing reducing cross-threading risks
• Regulatory compliance assurance meeting ASME B18.2.1 specifications for dimensional accuracy and material standards
• Environmental safety compliance with RoHS 3 and REACH regulations, ensuring safe use in regulated industries

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this 7/8"-9 UNC hex head screw delivers critical reliability in structural assemblies, machinery, and marine equipment. The 316 Stainless Steel material provides excellent resistance to chlorides and acidic environments, preventing premature failure in offshore or chemical processing installations. With a coarse thread design and Class 2A thread fit, installation is accelerated while maintaining vibration resistance in high-stress connections. The fully threaded 4" length ensures maximum grip range for thick material stacks, while the external hex drive accommodates standard tools for maintenance accessibility. These industrial hex screws solve common challenges of corrosion-induced weakening and assembly inefficiency in demanding right-hand thread applications.

Specification Summary & Compliance

This hex head screw features 7/8"-9 UNC coarse threads with Class 2A thread fit per ASME B18.2.1 standards, ensuring precise dimensional tolerance for consistent performance. Manufacturing complies with ASME B18.2.1 specifications for inch-system fasteners, with full traceability. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming restriction of hazardous substances for industrial safety.