S-90459A103 0.562" ID x 1.375" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Lightweight corrosion resistance from aluminum construction reduces equipment weight while providing excellent protection against rust and oxidation
• Precise dimensional compatibility with 1/2" screws ensures perfect fit and uniform load distribution across your assembly
• USS designation compliance guarantees standardized dimensions and performance characteristics for reliable industrial applications
• Superior electrical conductivity makes these washers ideal for electrical and electronic assemblies where grounding is critical
• Environmental regulation compliance with RoHS 3 and REACH standards ensures safe, sustainable use across global markets
• Optimized thickness range (0.086-0.132") provides flexibility for various compression and spacing requirements
• ASME B18.21.1 specification ensures consistent quality and performance in demanding mechanical applications

Professional Applications & Engineering Value

This aluminum flat washer delivers exceptional engineering value through its carefully engineered USS designation and ASME B18.21.1 compliance. The aluminum material provides an optimal solution for applications requiring lightweight components with natural corrosion resistance, eliminating the need for additional coatings in many environments. The precise 0.562" inner diameter and 1.375" outer diameter work in harmony to distribute clamping forces effectively, preventing surface damage and maintaining joint integrity. These flat washers are particularly valuable in electrical assemblies where conductivity matters, aerospace applications demanding weight reduction, and marine environments where corrosion protection is paramount. The inch system measurements ensure seamless integration with standard 1/2" screw fasteners across North American industrial equipment.

Specification Summary & Compliance

This aluminum flat washer features precise dimensional specifications including 0.562" inner diameter, 1.375" outer diameter, and thickness ranging from 0.086" to 0.132". Manufactured to USS standards within the inch measurement system, these washers comply with ASME B18.21.1 mechanical specifications for consistent performance. The product maintains full compliance with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) standards, including the latest SVHC updates as of June 14, 2023, ensuring environmental safety and regulatory acceptance across international markets.