S-98044A243 21 mm ID x 37 mm OD DIN 125; ISO 7089 General Purpose Washers

Key Features & Benefits at a Glance

• Superior electrical conductivity for reliable current transfer in demanding electrical systems
• Excellent corrosion resistance ensuring long-term performance in harsh or humid environments
• Precise dimensional accuracy with 21mm ID and 37mm OD for perfect fit with M20 fasteners
• Optimal mechanical strength with Rockwell B35 hardness providing durability under compression loads
• International standard compliance meeting DIN 125 and ISO 7089 specifications for global project compatibility
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe, sustainable operations
• Consistent thickness control (2.7-3.3mm) ensuring uniform load distribution and sealing performance

Professional Applications & Engineering Value

These M20 metric copper flat washers deliver exceptional engineering value in critical electrical and industrial applications. The high-purity copper material provides unmatched electrical conductivity while naturally resisting galvanic corrosion, making them ideal for electrical grounding systems, power distribution equipment, and corrosion-prone environments. The precise DIN 125 and ISO 7089 certification ensures dimensional consistency that prevents loosening in vibration-heavy installations. With their Rockwell B35 hardness, these washers maintain structural integrity under repeated thermal cycling and mechanical stress, solving common failure points in electrical connections and industrial machinery where reliable performance is non-negotiable.

Specification Summary & Compliance

This copper flat washer features precise dimensional specifications with 21mm inner diameter, 37mm outer diameter, and thickness ranging 2.7-3.3mm, designed specifically for M20 screw size applications. Manufactured to DIN 125 and ISO 7089 standards for dimensional accuracy and performance consistency. The washers are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring they meet the latest international safety and sustainability requirements for industrial components.