S-93413A333 21 mm ID x 37 mm OD DIN 125; ISO 7089 General Purpose Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-coated steel construction for long-lasting performance in harsh environments
• Precise dimensional accuracy with 21mm ID and 37mm OD ensuring perfect fit for M20 screws and consistent load distribution
• International standard compliance meeting DIN 125 and ISO 7089 specifications for reliable interchangeability
• Heavy-duty thickness range of 2.7-3.3mm providing enhanced durability and vibration resistance
• Environmental regulation compliance with RoHS 3 and REACH standards for safe industrial use
• Versatile metric sizing compatible with global equipment and fastener systems
• Cost-effective protection extending service life of assembled components while preventing galvanic corrosion

Professional Applications & Engineering Value

This M20 flat washer delivers critical engineering value through its black corrosion-resistant coated steel construction, specifically engineered to combat degradation in demanding industrial environments. The metric flat washer design prevents fastener loosening under vibration while distributing clamping force evenly across surfaces. Manufactured to DIN 125 and ISO 7089 standards, these washers provide reliable performance in machinery assembly, structural steel connections, and outdoor equipment where moisture and chemicals pose corrosion risks. The precise 21mm internal diameter ensures perfect alignment with M20 screws, eliminating installation issues and reducing maintenance costs in automotive, construction, and manufacturing applications.

Specification Summary & Compliance

This flat washer features dimensional specifications of 21mm ID, 37mm OD, and 2.7-3.3mm thickness, manufactured to DIN 125 and ISO 7089 standards for precision fit and performance. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The black corrosion-resistant coating provides additional protection while maintaining the mechanical properties of steel substrate.