S-98687A134 4.3 mm ID x 9 mm OD DIN 125 General Purpose Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution - The 9mm outer diameter provides superior surface coverage, reducing stress and preventing damage to assembled components
• Precision Fit Guarantee - 4.3mm internal diameter ensures perfect alignment with M4 screws, eliminating play and maintaining assembly integrity
• Consistent Performance - Rockwell B76 hardness rating delivers reliable mechanical strength and resistance to deformation under pressure
• International Standard Compliance - Manufactured to DIN 125 specifications for guaranteed dimensional accuracy and interchangeability
• Optimal Thickness Control - 0.7-0.9mm thickness range provides ideal spacing while maintaining structural stability
• Environmental Responsibility - Full RoHS 3 and REACH compliance ensures safe usage in regulated industries and global markets
• Durable Steel Construction - High-quality steel material offers excellent corrosion resistance and long-term reliability in harsh environments

Professional Applications & Engineering Value

This M4 metric flat washer engineered to DIN 125 standards addresses critical engineering challenges in industrial fastening systems. The steel construction with Rockwell B76 hardness provides exceptional resistance to compression forces, preventing fastener loosening in high-vibration applications. The precise 4.3mm internal diameter ensures perfect M4 screw compatibility while the 9mm outer diameter maximizes load distribution across connected surfaces. These precision washers are essential in machinery assembly, automotive manufacturing, and electronic enclosures where consistent spacing and reliable performance under mechanical stress are paramount. The controlled thickness variation (0.7-0.9mm) accommodates manufacturing tolerances while maintaining uniform clamping force across production runs.

Specification Summary & Compliance

This flat washer meets DIN 125 specifications with precise dimensional tolerances: 4.3mm internal diameter, 9mm outer diameter, and 0.7-0.9mm thickness range. Manufactured from high-grade steel with Rockwell B76 hardness for consistent mechanical performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted use in international markets. Designed specifically for M4 screw applications in metric fastening systems.