S-92800A345 1 1/4"-7 x 3 1/4" 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 outdoor applications
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness for reliable heavy-duty performance
• Precision thread engagement with Class 2A fit UNC coarse threads ensuring secure fastening and vibration resistance
• Full-threaded design provides maximum grip length and load distribution across the entire shank
• External hex drive compatibility with 1 7/8" head width for standard wrenching tools and high-torque installation
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Optimized for industrial durability with coarse threading that resists cross-threading and simplifies assembly in demanding conditions

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this 1 1/4"-7 UNC hex head screw delivers critical performance where standard fasteners fail. The 18-8 stainless steel composition provides excellent corrosion resistance in chemical processing, marine environments, and outdoor structures, while the coarse UNC thread design prevents jamming in high-vibration machinery and structural steel connections. With 80,000 psi tensile strength and Rockwell B70 hardness, it maintains clamping force under extreme loads in construction equipment, heavy machinery frames, and infrastructure projects. The fully threaded configuration ensures uniform stress distribution, making it ideal for thick material assemblies where maximum thread engagement is essential for structural integrity.

Specification Summary & Compliance

This heavy-duty hex head screw features precision 1 1/4"-7 UNC coarse threads with Class 2A thread fit per ASME B1.1 standards, ensuring consistent dimensional accuracy and proper clearance for industrial assembly. The fastener maintains 3 1/4" length with 1 7/8" hex head dimensions compatible with standard tools. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and material transparency for global industrial supply chains.