S-98687A312 13 mm ID x 20 mm OD DIN 433 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black oxide steel construction for extended service life in demanding environments
• Precise dimensional accuracy with 13mm ID and 20mm OD ensuring perfect fit for M12 screws and consistent performance
• Optimized load distribution through 1.8-2.2mm thickness range, preventing surface damage and joint loosening
• Guaranteed standardization with DIN 433 compliance for reliable interchangeability across industrial applications
• Environmental responsibility through RoHS 3 and REACH compliance, meeting strict international regulatory standards
• Enhanced durability from steel material properties, maintaining structural integrity under repeated stress
• Universal compatibility with metric M12 fastening systems, simplifying inventory and assembly processes

Professional Applications & Engineering Value

These M12 flat washers deliver critical engineering solutions where load distribution and surface protection are paramount. The black oxide steel construction provides essential corrosion resistance for industrial environments exposed to moisture or chemicals, while the DIN 433 standard ensures dimensional precision for reliable performance in machinery assembly, automotive manufacturing, and structural applications. The metric sizing (13mm ID × 20mm OD) guarantees perfect compatibility with M12 fasteners, preventing bolt head embedding and distributing clamping forces evenly across joined surfaces. This flat washer design addresses common failure points in fastened connections by reducing friction, preventing loosening from vibration, and protecting expensive components from damage during torque application.

Specification Summary & Compliance

Manufactured to DIN 433 specifications with precise metric dimensions: 13mm inner diameter, 20mm outer diameter, and 1.8-2.2mm thickness range. Constructed from black oxide steel for enhanced corrosion protection. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors. Designed specifically for M12 screw size applications in metric fastening systems.