S-92210A542 1/4"-20 x 1" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-lasting fastening.
• Precise and secure thread engagement with Class 3A thread fit and UNC coarse threads, ensuring vibration resistance and easy assembly.
• Flush, low-profile installation thanks to the standard flat head with 82° countersink angle, perfect for applications requiring a smooth surface.
• Efficient installation and removal using a 5/32" hex drive, providing high torque transfer and reducing tool slippage.
• Full threading along the 1" length for maximum grip and adjustability in a wide range of material thicknesses.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.

Professional Applications & Engineering Value

These 1/4"-20 UNC flat head screws are engineered to solve critical challenges in demanding industrial applications. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to corrosion and oxidation, extending service life in environments exposed to moisture or chemicals. The Class 3A thread fit and coarse UNC threading ensure a tight, secure fit that minimizes loosening under vibration, which is common in machinery and equipment assembly. The flat head design with an 82° countersink allows for a flush mount, preventing snagging and maintaining aerodynamic or aesthetic surfaces in enclosures, panels, and fixtures. The hex drive facilitates quick and secure installation, reducing assembly time and improving productivity in high-volume manufacturing settings.

Specification Summary & Compliance

This screw features precise Class 3A thread fit and adheres to UNC coarse thread standards with a size of 1/4"-20. Manufacturing and dimensional specifications conform to ASME B18.3. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various markets.