S-90483A152 4.3 mm ID x 9 mm OD DIN 125; ISO 7089 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance through zinc yellow-chromate plating, extending service life in demanding industrial environments
• Precise dimensional fit with 4.3mm ID and 9mm OD ensuring optimal load distribution and secure M4 screw fastening
• Enhanced mechanical durability with Rockwell C38 hardness providing reliable performance under vibration and stress
• International standard compliance meeting both DIN 125 and ISO 7089 specifications for global project compatibility
• Consistent thickness control (0.7-0.9mm) maintaining uniform pressure distribution and joint integrity
• Environmental regulation compliance with RoHS 3 and REACH adherence for sustainable manufacturing operations
• Versatile metric sizing compatible with standard M4 fastener systems across multiple industrial applications

Professional Applications & Engineering Value

This M4 flat washer delivers critical engineering value through its zinc yellow-chromate plated steel construction, specifically engineered to combat corrosion in industrial environments where moisture, chemicals, and atmospheric exposure degrade ordinary washers. The Rockwell C38 hardness ensures dimensional stability under load, preventing deformation in high-vibration applications such as machinery assembly, automotive components, and electrical enclosures. Manufactured to DIN 125 and ISO 7089 standards, these precision washers provide reliable load distribution for M4 fasteners while maintaining consistent 0.7-0.9mm thickness for uniform clamping force. The combination of corrosion-resistant plating and standardized metric dimensions makes them ideal for OEM manufacturing, maintenance operations, and assembly lines requiring durable, specification-compliant fastening solutions.

Specification Summary & Compliance

This flat washer features precision dimensions with 4.3mm inner diameter, 9mm outer diameter, and controlled thickness between 0.7-0.9mm. Manufactured to DIN 125 and ISO 7089 standards, ensuring dimensional accuracy and interchangeability. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety requirements for industrial applications worldwide.