S-90474A181 0.406" ID x 0.734" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to aluminum construction, ideal for harsh industrial environments
• Precise dimensional fit with 0.406" ID specifically engineered for 3/8" screws to prevent loosening
• Optimal load distribution provided by 0.734" OD, reducing surface pressure and material stress
• Consistent performance ensured by ASME B18.21.1 compliance for reliable mechanical applications
• Environmental compliance with RoHS 3 and REACH regulations for safe, sustainable operations
• Lightweight durability from aluminum material, reducing overall assembly weight without sacrificing strength
• Versatile thickness range (0.056-0.071") accommodates various gasketing and spacing requirements

Professional Applications & Engineering Value

These aluminum flat washers deliver exceptional engineering value in demanding industrial applications where corrosion resistance and precise dimensional control are critical. The aluminum construction provides excellent protection against oxidation and galvanic corrosion, making them ideal for outdoor equipment, marine environments, and chemical processing facilities. Engineered to ASME B18.21.1 standards, these washers ensure reliable performance in mechanical assemblies, electrical enclosures, and structural frameworks where consistent load distribution is essential. The precise 0.406" inner diameter creates a secure fit for 3/8" screw applications, preventing movement and maintaining bolt tension under vibration and thermal cycling conditions. The combination of aluminum material properties and strict manufacturing tolerances solves common industrial challenges including weight reduction requirements, electrical conductivity needs, and environmental compliance mandates.

Specification Summary & Compliance

This flat washer features precise dimensional specifications including 0.406" inner diameter, 0.734" outer diameter, and thickness range of 0.056-0.071" designed specifically for 3/8" screw applications. Manufactured to ASME B18.21.1 standards for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in various industrial and commercial applications. Made from aluminum material in the inch measurement system for compatibility with standard industrial components and assembly requirements.