S-92210A087 2-56 x 1" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced Corrosion Resistance: Passivated finish on 18-8 stainless steel provides superior protection against rust and environmental degradation, extending service life in harsh conditions.
• High Tensile Strength & Durability: With a tensile strength of 70,000 psi and Rockwell B55 hardness, these screws withstand high stress and repetitive loads without failure.
• Precise Thread Fit for Secure Fastening: Class 3A thread fit ensures tight, reliable engagement with mating parts, reducing the risk of loosening in vibration-prone applications.
• Optimized Head Design for Flush Installation: Standard flat head with 82° countersink angle allows for a smooth, flush finish, ideal for applications where protrusion is not acceptable.
• Easy Installation with Hex Drive: 0.050" hex drive enables efficient torque application with standard tools, speeding up assembly and reducing installation time.
• Broad Industrial Compliance: Meets ASME B18.3 specifications and is compliant with RoHS 3 and REACH, ensuring suitability for regulated and international markets.
• Versatile Coarse Threading: UNC coarse thread spacing facilitates quick assembly and disassembly, making it suitable for a wide range of materials and applications.

Professional Applications & Engineering Value

These 2-56 UNC flat head screws are engineered to address critical challenges in industrial settings, such as vibration-induced loosening and corrosion in demanding environments. Made from 18-8 stainless steel with a passivated finish, they offer exceptional resistance to moisture, chemicals, and oxidation, making them ideal for applications in electronics, machinery, and outdoor equipment. The Class 3A thread fit and coarse thread spacing ensure secure, reliable fastening even under dynamic loads, while the 82° countersink angle and flat head design provide a seamless fit in countersunk holes, reducing aerodynamic drag and improving aesthetics. With a tensile strength of 70,000 psi and full threading, these screws deliver consistent performance in assembly lines, automotive components, and precision instruments, minimizing maintenance and replacement costs.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including Class 3A thread fit for high accuracy and UNC thread type with coarse spacing. It is manufactured in compliance with ASME B18.3 specifications and meets regulatory requirements such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental safety and global market suitability. The screw features a length of 1", head diameter of 0.197", and is fully threaded for uniform load distribution.