S-91635A320 21 mm ID x 37 mm OD DIN 125; ISO 7089 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from brass material, ideal for humid or chemically aggressive environments
• Precise dimensional fit with 21mm ID and 37mm OD ensuring secure seating for M20 screws
• Consistent load distribution with 2.7-3.3mm thickness range, reducing surface damage and loosening risks
• Guaranteed interchangeability through compliance with DIN 125 and ISO 7089 international standards
• Environmental and workplace safety with full RoHS 3 and REACH compliance
• Excellent electrical conductivity for grounding and electrical assembly applications
• Long-term durability with brass's natural anti-galling properties and minimal maintenance requirements

Professional Applications & Engineering Value

This M20 brass flat washer delivers critical engineering solutions where corrosion resistance and electrical conductivity are paramount. The brass construction prevents rust formation in marine, plumbing, and electrical systems, while the DIN 125 and ISO 7089 compliance ensures perfect fit with metric M20 fasteners. Engineers specify these washers for industrial machinery, electrical panels, and outdoor equipment where galvanic corrosion must be prevented and reliable performance under vibration is essential. The precise 21mm inner diameter and 37mm outer diameter provide optimal bearing surface, protecting components from damage while maintaining secure fastening integrity.

Specification Summary & Compliance

Manufactured to DIN 125 and ISO 7089 standards with dimensional tolerances including 21mm inner diameter, 37mm outer diameter, and 2.7-3.3mm thickness range. These metric flat washers are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance compliance for global industrial applications.