S-91166A170 1.7 mm ID x 4 mm OD DIN 125; ISO 7089 General Purpose Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through zinc plating, extending service life in demanding industrial environments
• Precise dimensional accuracy with 1.7mm ID and 4mm OD ensuring perfect fit for M1.6 screw applications
• Superior load distribution with controlled 0.2-0.4mm thickness range, preventing surface damage and loosening
• Certified material hardness at Rockwell B75 for reliable performance under vibration and stress conditions
• Dual-standard compliance with both DIN 125 and ISO 7089 specifications for global manufacturing compatibility
• Environmental regulation compliance meeting RoHS 3 and REACH standards for safe use across industries
• Optimized for miniature assemblies providing critical spacing and protection in compact electronic and precision mechanical applications

Professional Applications & Engineering Value

These M1.6 metric flat washers deliver exceptional engineering value in precision assemblies where space constraints and material compatibility are critical. The zinc plated steel construction provides essential corrosion protection while maintaining electrical conductivity, making them ideal for electronic enclosures, small machinery, and instrumentation. The precise 1.7mm internal diameter ensures secure seating on M1.6 fasteners without slippage, while the 4mm outer diameter offers optimal surface coverage to prevent embedding and distribute clamping forces effectively. Manufactured to DIN 125 and ISO 7089 standards, these washers eliminate compatibility concerns in multinational projects and OEM specifications, providing reliable performance in automotive electronics, medical devices, and precision optical equipment where vibration resistance and dimensional stability are paramount.

Specification Summary & Compliance

This flat washer features precise metric dimensions with 1.7mm internal diameter, 4mm outer diameter, and 0.2-0.4mm thickness range. Manufactured from zinc plated steel with Rockwell B75 hardness rating, the component fully complies with DIN 125 and ISO 7089 international standards for dimensional accuracy and mechanical properties. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, ensuring unrestricted use in regulated industries and global supply chains.