S-90474A186 0.406" ID x 0.734" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior electrical and thermal conductivity for reliable performance in electrical and grounding applications
• Excellent corrosion resistance ensuring long-term durability in harsh industrial environments
• Precise dimensional fit with 0.406" ID specifically engineered for 3/8" screws, preventing loosening and ensuring secure fastening
• ASME B18.21.1 certified quality guaranteeing consistent performance and interchangeability in industrial assemblies
• Environmental compliance assurance with RoHS 3 and REACH compliance for safe use in regulated industries
• Optimized load distribution through 0.734" OD design, reducing surface pressure and preventing material damage
• Consistent thickness control (0.056-0.071") ensuring uniform performance across production batches

Professional Applications & Engineering Value

These copper flat washers deliver exceptional engineering value through their unique material properties and precision manufacturing. The copper construction provides inherent corrosion resistance while maintaining excellent electrical conductivity, making them ideal for electrical panels, grounding systems, and industrial equipment where both mechanical fastening and electrical performance are critical. The ASME B18.21.1 compliance ensures dimensional accuracy and reliability in high-vibration environments, while the specific 0.406" ID design for 3/8" screws eliminates compatibility issues in assembly operations. These industrial copper washers solve common challenges of galvanic corrosion and poor conductivity in electrical applications, providing long-term reliability in demanding conditions.

Specification Summary & Compliance

This copper flat washer features precise inch system dimensions with 0.406" internal diameter, 0.734" outer diameter, and controlled thickness range of 0.056-0.071". Manufactured to ASME B18.21.1 specifications for flat washers, ensuring dimensional accuracy and performance reliability. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making them suitable for use in environmentally conscious industrial applications and international markets with strict chemical substance restrictions.