S-91166A220 3.7 mm ID x 8 mm OD DIN 125; ISO 7089 General Purpose Washers
General Purpose Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion protection through zinc plating extends service life in demanding industrial environments
- Precise dimensional accuracy with 3.7mm ID and 8mm OD ensures perfect fit for M3.5 fasteners
- Enhanced load distribution with consistent 0.4-0.6mm thickness prevents surface damage and loosening
- Reliable mechanical performance backed by Rockwell B75 hardness rating for durable fastening applications
- International standardization meeting both DIN 125 and ISO 7089 specifications for global compatibility
- Environmental compliance with RoHS 3 and REACH regulations for safe, sustainable manufacturing
- Optimized thickness tolerance provides consistent performance across production batches
Professional Applications & Engineering Value
These M3.5 metric flat washers deliver exceptional engineering value through their zinc plated steel construction and precise manufacturing. The combination of Rockwell B75 hardness and controlled thickness (0.4-0.6mm) ensures reliable performance in vibration-prone applications where fastener loosening is a concern. The zinc plating provides essential corrosion resistance for industrial equipment, machinery assembly, and outdoor applications where moisture exposure occurs. Meeting both DIN 125 and ISO 7089 standards, these washers offer international compatibility for global supply chains and manufacturing operations. Their precise inner diameter (3.7mm) and outer diameter (8mm) dimensions prevent misalignment issues while distributing clamp load effectively across joined surfaces.
Specification Summary & Compliance
This flat washer features precise metric dimensions with 3.7mm inner diameter, 8mm outer diameter, and controlled thickness range of 0.4-0.6mm. Manufactured to DIN 125 and ISO 7089 standards for dimensional accuracy and performance consistency. The zinc plated steel construction provides Rockwell B75 hardness for mechanical reliability. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and regulatory acceptance for industrial applications worldwide.
