S-98689A113 4.3 mm ID x 8 mm OD DIN 433; ISO 7092 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or chemically aggressive environments
• Precise dimensional fit with 4.3mm ID and 8mm OD ensuring perfect alignment with M4 screws and consistent load distribution
• Enhanced durability with Rockwell B76 hardness providing excellent resistance to deformation under pressure
• Guaranteed interchangeability through compliance with DIN 433 and ISO 7092 international standards
• Ultra-thin profile (0.4-0.6mm thickness) for space-constrained assemblies without compromising performance
• Environmental compliance meeting RoHS 3 and REACH regulations for global manufacturing applications
• Reliable performance in high-stress applications due to consistent material properties and manufacturing precision

Professional Applications & Engineering Value

These M4 metric flat washers deliver critical engineering solutions where corrosion resistance and dimensional precision are paramount. The 18-8 stainless steel composition prevents rust formation in marine, chemical processing, and food industry applications, eliminating premature failure risks. The precisely controlled 4.3mm internal diameter ensures secure seating on M4 fasteners while the 8mm outer diameter provides optimal surface coverage to prevent embedding and distribute clamping forces evenly. Manufactured to DIN 433 and ISO 7092 standards, these washers maintain consistent performance in automated assembly systems and precision equipment where dimensional stability is critical. The combination of Rockwell B76 hardness and thin profile makes them ideal for electronics, instrumentation, and compact mechanical assemblies requiring reliable fastening solutions.

Specification Summary & Compliance

This flat washer features metric dimensions with 4.3mm ID ±0.2mm, 8mm OD ±0.3mm, and thickness ranging 0.4-0.6mm, manufactured to DIN 433 and ISO 7092 dimensional standards. The 18-8 stainless steel construction ensures consistent mechanical properties with Rockwell B76 hardness specification. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making these washers suitable for global industrial applications requiring environmental responsibility and material safety.