S-92703A107 2-56 x 5/16" ASME B18.3 Stainless Steel Torx 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.
• Enhanced torque transmission and reduced cam-out thanks to the Torx Plus IP6 drive, ensuring secure fastening and tool longevity.
• High mechanical strength offering 60,000 psi tensile strength and Rockwell B70 hardness for reliable performance under load.
• Precise and secure fit with Class 2A thread fit and UNC coarse thread, providing consistent engagement and vibration resistance.
• Flush mounting capability due to the standard flat head with 82° countersink angle, creating a smooth surface finish.
• Full threading for maximum grip along the 5/16" length, ensuring strong holding power across the entire fastener.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.

Professional Applications & Engineering Value

This 2-56 UNC flat head screw is engineered to address critical challenges in precision assembly and machinery. The 18-8 stainless steel material, combined with a passivated finish, provides exceptional resistance to oxidation and chemical exposure, making it suitable for applications in electronics, automotive, and aerospace where environmental durability is essential. The Torx Plus drive (IP6/T6) minimizes tool slippage and wear, enabling higher torque application and reducing assembly errors in high-volume production lines. Its fully threaded design and coarse thread ensure rapid installation and robust retention in materials like metals and engineered plastics, while the flat head with 82° countersink allows for seamless integration without protrusion, maintaining aerodynamic and aesthetic profiles in finished products.

Specification Summary & Compliance

This screw features a 2-56 UNC thread size with Class 2A thread fit for standard tolerance and reliable engagement. It adheres to the ASME B18.3 specification for dimensional accuracy and performance. 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 industrial use. Additional details include a right-hand thread direction, standard flat head profile, and full threading over the 5/16" length.