S-97310A128 4.3 mm ID x 12 mm OD DIN 7349 Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
• Precise dimensional compatibility with 4.3mm ID specifically designed for M4 screws, providing secure fastening without slippage
• Optimized load distribution through 12mm OD design, reducing surface pressure and preventing material damage
• Consistent performance guaranteed by DIN 7349 standard compliance, ensuring interchangeability and engineering precision
• Environmental regulation compliance with RoHS 3 and REACH standards, making them suitable for regulated industries
• Durable material properties of 18-8 stainless steel offering excellent strength and wear resistance for repeated use
• Versatile thickness range (1.4-1.8mm) accommodating various assembly requirements while maintaining structural integrity

Professional Applications & Engineering Value

These M4 flat washers deliver critical engineering solutions where corrosion resistance and dimensional precision are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for industrial applications in manufacturing equipment, marine environments, and food processing machinery. The DIN 7349 standard ensures perfect compatibility with metric fastening systems, while the optimized inner diameter prevents thread damage during installation. Engineers specify these metric flat washers for applications requiring reliable load distribution and long-term fastener integrity, particularly in assemblies where maintenance access is limited and component failure is not an option.

Specification Summary & Compliance

Manufactured to DIN 7349 specifications with precise metric dimensions: 4.3mm ID, 12mm OD, and 1.4-1.8mm thickness range. These flat washers maintain dimensional accuracy for consistent performance in M4 screw applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and workplace safety. The passivated surface treatment on 18-8 stainless steel provides enhanced corrosion protection while maintaining the material's inherent mechanical properties.