S-90483A175 31 mm ID x 56 mm OD DIN 125; ISO 7089 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc yellow-chromate plating for extended service life in harsh industrial environments
• Precise dimensional fit with 31mm ID and 56mm OD ensuring perfect compatibility with M30 screws
• Exceptional load distribution through optimal thickness range (3.7-4.3mm) to prevent surface damage and joint loosening
• Enhanced mechanical strength with Rockwell C38 hardness providing reliable performance under high-stress conditions
• Guaranteed interchangeability through compliance with both DIN 125 and ISO 7089 international standards
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for safe global industrial use
• Consistent quality performance through standardized manufacturing processes for predictable results in critical applications

Professional Applications & Engineering Value

This M30 flat washer delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assembly. The zinc yellow-chromate plated steel construction provides exceptional corrosion protection in demanding environments where moisture, chemicals, or outdoor exposure could compromise fastener integrity. With precise metric dimensions (56mm OD, 31mm ID) and controlled thickness, it ensures uniform load distribution across mating surfaces, preventing bolt loosening and surface deformation under vibration or dynamic loads. The Rockwell C38 hardness maintains dimensional stability under extreme pressure, making it ideal for construction, automotive, and manufacturing applications where reliable performance and long-term durability are paramount. Compliance with DIN 125 and ISO 7089 standards guarantees consistent quality and interchangeability across global projects.

Specification Summary & Compliance

This flat washer features precise metric dimensions with 31mm internal diameter, 56mm outer diameter, and 3.7-4.3mm thickness range. Manufactured to DIN 125 and ISO 7089 standards, ensuring dimensional accuracy and performance consistency. The zinc yellow-chromate plated steel construction provides both corrosion protection and aesthetic finish. Material hardness is certified at Rockwell C38 for mechanical reliability. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental safety and unrestricted use in industrial applications worldwide.