S-90472A120 0.343" ID x 0.688" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 17-7 PH Stainless Steel construction, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength with Rockwell C40 hardness for reliable load distribution and vibration resistance
• Precision dimensional accuracy with 0.343" ID and 0.688" OD for perfect fit with 5/16" fasteners
• Industry-standard compliance with ASME B18.21.1 specifications for guaranteed interchangeability and performance
• Environmental regulation compliance with RoHS 3 and REACH standards for safe, sustainable industrial use
• Optimized thickness range (0.051-0.080") providing consistent sealing and spacing performance
• Heavy-duty durability for demanding applications where reliability and longevity are critical

Professional Applications & Engineering Value

These 5/16" SAE flat washers deliver exceptional engineering value through their 17-7 PH Stainless Steel composition and precision manufacturing. The precipitation-hardening stainless steel provides outstanding corrosion resistance while maintaining high strength at Rockwell C40 hardness, making them ideal for industrial applications exposed to moisture, chemicals, and extreme temperatures. The flat washer design ensures proper load distribution across mating surfaces, preventing component damage and maintaining assembly integrity in machinery, automotive systems, and structural applications. Their compliance with ASME B18.21.1 standards guarantees dimensional accuracy and performance consistency, while the inch system measurement ensures compatibility with North American industrial equipment and specifications.

Specification Summary & Compliance

These SAE flat washers feature precise dimensional specifications including 0.343" inner diameter, 0.688" outer diameter, and thickness ranging from 0.051" to 0.080" designed for 5/16" screw size applications. Manufactured to ASME B18.21.1 standards, they ensure proper fit and function within inch-system assemblies. The washers are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental and safety requirements for industrial components. The 17-7 PH Stainless Steel material provides consistent performance across the specified hardness range of Rockwell C40.