S-92210A644 3/8"-24 x 1 1/2" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh environments
• Superior load-bearing capacity from 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance
• Precise thread engagement with Class 3A UNF fine threading, ensuring secure fastening in critical assemblies
• Efficient installation via 7/32" hex drive and standard 82° countersink angle for flush mounting
• Full-thread design maximizes grip length and distribution of stress along the entire 1-1/2" length
• Regulatory compliance with ASME B18.3, RoHS 3, and REACH for safe, standardized use in regulated industries
• Durable flat head profile provides a smooth surface finish while resisting tool slippage during tightening

Professional Applications & Engineering Value

This 3/8"-24 UNF flat head screw in 18-8 stainless steel is engineered to address common industrial challenges such as vibration loosening and environmental degradation. The Class 3A fine threading offers tighter tolerances than standard fits, reducing the risk of thread stripping in high-stress applications like machinery, automotive assemblies, and electronic enclosures. Its passivated finish enhances the innate corrosion resistance of stainless steel, making it suitable for outdoor, marine, or chemical-exposed settings. The combination of fully threaded design and 82° countersink angle ensures optimal clamping force and a seamless fit in countersunk holes, minimizing protrusions and improving aerodynamic or aesthetic profiles. These features deliver long-term reliability, reduced maintenance cycles, and compliance with global standards for industrial fasteners.

Specification Summary & Compliance

This screw maintains precision Class 3A thread fit per UNF standards, with a fine thread spacing of 24 TPI and full threading along the 1-1/2" length. It conforms to ASME B18.3 for dimensional consistency and mechanical properties. The product is verified as RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to restrictions on hazardous substances and supporting environmentally responsible manufacturing practices.