S-91455A180 21 mm ID x 37 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
- Enhanced corrosion resistance through zinc plating, extending service life in demanding industrial environments.
- Superior load distribution with a 37mm outer diameter, minimizing surface pressure and preventing material damage.
- Precise fit for M20 fasteners with a 21mm inner diameter, ensuring secure assembly and reducing installation errors.
- Consistent performance and durability backed by Rockwell B91 hardness, providing reliable strength under stress.
- Guaranteed dimensional accuracy and interchangeability, manufactured to DIN 125 and ISO 7089 standards.
- Safe for regulated industries with full compliance to RoHS 3 and REACH environmental directives.
- Optimized thickness (2.7-3.3mm) for effective spacing and vibration resistance in heavy-duty applications.
Professional Applications & Engineering Value
This M20 flat washer is engineered from zinc plated steel to address common industrial challenges like galvanic corrosion, surface abrasion, and joint loosening. Its robust construction and Rockwell B91 hardness ensure it maintains clamp load under high vibration, making it ideal for machinery, structural steelwork, and automotive assemblies. The precise metric dimensions and compliance with DIN 125 and ISO 7089 standards guarantee consistent performance in automated production lines. By providing a reliable, corrosion-resistant barrier, this washer prolongs the lifespan of connected components, reducing maintenance costs and downtime in industrial applications.
Specification Summary & Compliance
This flat washer features an ID of 21mm, OD of 37mm, and thickness of 2.7-3.3mm, manufactured to DIN 125 and ISO 7089 standards for dimensional precision and interchangeability. It is made from zinc plated steel with a hardness of Rockwell B91, ensuring consistent mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), meeting stringent environmental and safety regulations for industrial use.
