S-98689A221 1.7 mm ID x 3.5 mm OD DIN 433 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extending component lifespan
• Precise dimensional fit with 1.7mm ID and 3.5mm OD, ensuring secure seating and even load distribution for M1.6 screws
• Enhanced durability and surface protection from Rockwell B75 hardness, resisting deformation under pressure
• Reliable standardization per DIN 433, guaranteeing interchangeability and consistent performance in metric assemblies
• Ultra-thin profile (0.3-0.4mm) for space-constrained applications without sacrificing strength or function
• Full regulatory compliance with RoHS 3 and REACH, ensuring safe use in global industrial and electronic markets
• Optimized for precision equipment where minimal thickness and high material integrity are critical

Professional Applications & Engineering Value

This M1.6 metric flat washer is engineered to address critical challenges in precision assemblies, particularly in electronics, miniature mechanisms, and instrumentation. The 18-8 stainless steel material provides excellent corrosion resistance, preventing failure in humid or chemically aggressive settings. Its thin 0.3-0.4mm thickness and strict adherence to DIN 433 standards ensure it fits seamlessly in compact designs, distributing clamp load effectively to prevent loosening and surface damage. For engineers, this means enhanced reliability in small screw applications, reduced maintenance, and long-term performance in industrial washers demanding exact tolerances and material purity.

Specification Summary & Compliance

This washer conforms to DIN 433 for dimensional accuracy and thread compatibility. It is manufactured from 18-8 stainless steel with an internal diameter of 1.7mm, outer diameter of 3.5mm, and thickness between 0.3-0.4mm, suited for M1.6 screw size. The material hardness is Rockwell B75 for consistent mechanical properties. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial components.