S-90474A185 0.281" ID x 0.5" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior electrical conductivity for reliable performance in electrical grounding and connection applications
• Excellent corrosion resistance ensuring long-term durability in harsh industrial environments
• Precise dimensional fit with 0.281" ID designed specifically for 1/4" screws, preventing loosening and misalignment
• Optimized load distribution through 0.5" OD design, reducing surface pressure and material stress
• Industry-standard compliance with ASME B18.21.1 specifications for consistent quality and interchangeability
• Environmental safety assurance through RoHS 3 and REACH compliance, meeting global regulatory requirements
• Enhanced thermal management leveraging copper's natural thermal properties for heat dissipation in electrical assemblies

Professional Applications & Engineering Value

These copper flat washers deliver critical engineering solutions where electrical conductivity and corrosion resistance are paramount. The copper material provides exceptional current-carrying capacity, making them ideal for electrical panels, grounding systems, and power distribution equipment where reliable electrical connections are essential. Their ASME B18.21.1 compliance ensures precise dimensional accuracy and consistent performance across industrial applications. The flat washer design with specific 0.281" ID and 0.5" OD dimensions prevents galvanic corrosion when used with compatible fasteners, while the copper construction maintains integrity in high-temperature environments common in electrical and electronic assemblies, solving critical challenges in power transmission and thermal management systems.

Specification Summary & Compliance

This copper flat washer features precise inch system dimensions with 0.281" internal diameter, 0.5" outer diameter, and thickness ranging from 0.056" to 0.071", specifically engineered for 1/4" screw applications. Manufactured to ASME B18.21.1 standards for dimensional accuracy and performance consistency. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (updated 06/14/2023, 235 SVHC), meeting the latest environmental and safety regulations for industrial components.