S-98688A143 4.3 mm ID x 9 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 resistance through zinc plating, extending service life in humid or outdoor environments
- Precise dimensional accuracy with 4.3mm ID and 9mm OD ensuring perfect fit for M4 screws in metric assemblies
- Enhanced load distribution with 0.7-0.9mm thickness preventing surface damage and loosening under vibration
- Exceptional mechanical strength from Rockwell C38 hardness, maintaining shape under high-pressure applications
- Guaranteed interchangeability through compliance with DIN 125 and ISO 7089 international standards
- Environmental compliance meeting RoHS 3 and REACH regulations for safe use in regulated industries
- Cost-effective protection for equipment and assemblies through reliable surface bearing and sealing functions
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these M4 metric flat washers solve critical fastening challenges in machinery, automotive, and electrical enclosures. The zinc plated steel construction provides essential corrosion resistance against moisture and chemicals, while the Rockwell C38 hardness ensures dimensional stability under repeated loading cycles. The precise DIN 125 and ISO 7089 compliance guarantees perfect fit with M4 screw sizes, eliminating assembly errors and reducing maintenance costs. Ideal for vibration-prone environments, these washers maintain bolt preload and prevent joint failure in heavy-duty equipment, making them indispensable for precision engineering applications requiring reliable, long-term performance.
Specification Summary & Compliance
Manufactured to exacting DIN 125 and ISO 7089 standards with precise dimensional tolerances for metric M4 screw applications. Features include 4.3mm inner diameter, 9mm outer diameter, and 0.7-0.9mm thickness range. Material specifications include zinc plated steel with Rockwell C38 hardness for consistent performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and industrial suitability.
