S-98363A111 5.5 mm ID x 18 mm OD DIN 440-R Oversized Washers

Key Features & Benefits at a Glance

• Superior load distribution with 18mm outer diameter to prevent surface damage and extend assembly life
• Precise M5 screw compatibility featuring 5.5mm inner diameter for secure, vibration-resistant fastening
• Exceptional durability achieved through Rockwell B50 hardness steel construction
• Reliable dimensional consistency with 1.7-2.3mm thickness range ensuring predictable performance
• Industry-standard compliance meeting DIN 440-R specifications for guaranteed interchangeability
• Environmental responsibility with full RoHS 3 and REACH compliance for global manufacturing
• Corrosion-resistant properties of steel material providing long-term reliability in harsh conditions

Professional Applications & Engineering Value

This M5 flat washer delivers critical engineering solutions where vibration resistance and load distribution are paramount. Manufactured from steel with Rockwell B50 hardness, it maintains structural integrity under repeated stress cycles, preventing fastener loosening in industrial machinery, automotive assemblies, and electrical enclosures. The DIN 440-R standard ensures perfect compatibility with metric M5 screws, while the optimized 18mm OD effectively disperses clamping force to protect sensitive surfaces. Particularly valuable in high-vibration environments, this metric steel washer eliminates the need for frequent maintenance while meeting stringent RoHS 3 and REACH compliance requirements for modern manufacturing applications.

Specification Summary & Compliance

This precision flat washer maintains exacting dimensional tolerances with 5.5mm ID, 18mm OD, and 1.7-2.3mm thickness range. Manufactured to DIN 440-R specifications for guaranteed metric compatibility, it features Rockwell B50 hardness steel construction. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and global market acceptance for industrial applications.