S-92210A610 5/16"-24 x 2" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 Stainless Steel construction and passivated finish, ideal for harsh environments.
• Superior thread engagement and vibration resistance from the Class 3A precision fit and UNF fine threading, ensuring reliable, long-term fastening.
• High mechanical strength with a 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
• Efficient and secure installation enabled by the 3/16" hex drive, preventing cam-out and allowing for high torque application.
• Flush, professional finish with a standard 82° countersink angle, allowing the flat head to sit seamlessly in prepared surfaces.
• Full-length threading provides maximum grip and holding power along the entire 2" shank length.
• Guaranteed quality and reliability through compliance with stringent ASME B18.3 manufacturing standards.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Flat Head Screw is engineered to solve critical challenges in industrial assembly and machinery. The combination of a Class 3A thread fit and UNF fine threading provides exceptional resistance to loosening under vibration, a common failure point in dynamic equipment. The passivated finish significantly enhances the innate corrosion resistance of stainless steel, making this hex drive screw suitable for use in moist, chemical, or outdoor environments without compromising integrity. Its high tensile strength and flat head design with an 82° countersink make it a reliable choice for applications in aerospace components, precision instruments, and heavy-duty machinery where a flush surface and dependable fastening are non-negotiable.

Specification Summary & Compliance

This screw is manufactured to precise dimensional standards, including a Class 3A thread fit for superior accuracy and a UNF (Unified National Fine) 5/16"-24 thread specification. It is produced in accordance with the ASME B18.3 standard, ensuring consistent quality and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and safe for use in regulated markets.