S-92186A950 1 1/8"-7 x 4" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel construction, ideal for harsh industrial and marine environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for heavy-duty load-bearing applications
• Reliable coarse UNC threading ensures faster installation and reduced cross-threading risk in demanding conditions
• Optimized partial threading design provides superior clamping force control and vibration resistance
• Precision Class 2A thread fit guarantees consistent engagement and smooth assembly operations
• Heavy-duty external hex drive with large 1 11/16" head width for maximum torque application and tool access
• Full regulatory compliance with ASME B18.2.1 standards plus RoHS 3 and REACH environmental directives

Professional Applications & Engineering Value

This 1 1/8"-7 UNC hex head screw in 316 stainless steel delivers critical engineering solutions where corrosion resistance and structural integrity are paramount. The combination of 70,000 psi tensile strength and coarse thread configuration makes it ideal for heavy machinery, structural steel connections, and marine equipment where vibration resistance and rapid assembly are essential. The partial threading design concentrates clamping force precisely where needed, preventing joint loosening in high-stress applications. With its external hex drive and substantial head dimensions, this fastener accommodates high-torque installation while maintaining the superior corrosion resistance that 316 stainless steel provides in chemically aggressive environments, including chemical processing plants and offshore installations.

Specification Summary & Compliance

This 4" hex head screw features 1 1/8"-7 UNC coarse threads with Class 2A thread fit tolerance for precise engagement. Manufacturing complies with ASME B18.2.1 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors. Threading is partially threaded with a minimum thread length of 2 1/2" and right-hand thread direction.