S-98269A440 5.3 mm ID x 10 mm OD DIN 125; ISO 7089 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from Black Oxide 18-8 Stainless Steel, ideal for harsh industrial environments
• Enhanced load distribution with precise 10mm OD and 5.3mm ID, reducing surface pressure and preventing material damage
• Consistent mechanical performance ensured by Rockwell B75 hardness, maintaining shape under stress
• Reliable dimensional accuracy per DIN 125 and ISO 7089 standards, guaranteeing perfect fit with M5 screws
• Long-term durability in thin 0.9-1.1mm profile, resisting wear and deformation over repeated use
• Safe for regulated industries with full RoHS 3 and REACH compliance, meeting strict environmental and health standards
• Broad compatibility with metric fastening systems, simplifying procurement and assembly processes

Professional Applications & Engineering Value

This M5 metric flat washer delivers critical engineering value by addressing common industrial challenges like corrosion-induced failure and inconsistent load bearing. Constructed from Black Oxide 18-8 Stainless Steel, it provides a durable, oxidation-resistant barrier that extends service life in moist or chemically aggressive settings—such as outdoor machinery, automotive assemblies, and food processing equipment. The DIN 125 and ISO 7089 certification ensures precise dimensional tolerances, eliminating misfits with M5 screws and reducing assembly errors. Its thin yet robust design (0.9–1.1 mm thickness) optimally distributes clamping force, protecting sensitive surfaces from cracking or indentation, while the Rockwell B75 hardness maintains structural integrity under vibration and dynamic loads. By integrating these features, the washer minimizes maintenance downtime and enhances the reliability of industrial fastening systems.

Specification Summary & Compliance

This flat washer conforms to DIN 125 and ISO 7089 standards, ensuring exacting dimensional control with an inner diameter of 5.3 mm, outer diameter of 10 mm, and thickness between 0.9–1.1 mm. It is manufactured from 18-8 Stainless Steel with a Black Oxide finish and Rockwell B75 hardness for consistent mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its suitability for use in environmentally conscious and safety-critical applications.