S-92210A606 5/16"-24 x 7/8" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 Stainless Steel and passivated finish, ensuring long-term reliability in harsh environments.
• Exceptional thread engagement and vibration resistance due to the Class 3A UNF fine thread fit, minimizing loosening in dynamic applications.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for demanding load-bearing applications.
• Secure, flush installation with a standard 82° countersink angle and flat head design, ideal for streamlined surfaces.
• Efficient installation and removal using a 3/16" hex drive, providing positive torque transmission and reducing tool slippage.
• Full thread coverage along the 7/8" length for maximum grip and holding power across the entire fastener.
• Guaranteed quality and safety through compliance with ASME B18.3, RoHS 3, and REACH, meeting strict industrial and environmental standards.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Flat Head Screw is engineered to solve critical challenges in precision assembly and corrosive environments. The Class 3A UNF fine threading provides a tighter, more reliable fit than coarse threads, significantly reducing the risk of vibration-induced loosening in machinery, automotive, and aerospace components. The combination of a passivated finish and the inherent corrosion resistance of stainless steel ensures longevity in applications exposed to moisture, chemicals, or outdoor elements. The flat head with an 82° countersink allows for a smooth, flush finish, preventing snagging and maintaining aerodynamic or aesthetic surfaces. Its high tensile strength and hex drive make it suitable for high-stress fastening where torque integrity and durability are non-negotiable, providing dependable performance in industrial fasteners for OEM and MRO needs.

Specification Summary & Compliance

This screw adheres to precise dimensional and performance criteria, including a Class 3A thread fit for superior tolerance control and a 5/16"-24 UNF thread specification. Manufacturing and quality are governed by ASME B18.3 standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free from hazardous substances and safe for various industrial and international markets.