S-95225A350 21 mm ID x 37 mm OD DIN 125 Plastic Washers

Key Features & Benefits at a Glance

• Exceptional Electrical and Thermal Insulation – Hard fiber construction prevents electrical conductivity and resists heat transfer, ideal for protecting sensitive components.
• Superior Durability Under Pressure – With a Rockwell R50 hardness rating, this washer maintains its shape and function under high mechanical stress.
• Reliable High-Temperature Performance – Withstands temperatures up to 230°F, ensuring stable performance in heated industrial environments.
• Precision Fit for M20 Screws – 21mm inner diameter and 37mm outer diameter provide a secure, snug fit, reducing loosening and vibration.
• Consistent Thickness for Even Load Distribution – 2.1-2.5mm thickness ensures uniform pressure distribution, preventing surface damage to assemblies.
• Compliance with Rigorous Industry Standards – Manufactured to DIN 125 specifications, guaranteeing dimensional accuracy and interchangeability.
• Safe for Sensitive Applications – RoHS 3 and REACH compliant, free from hazardous substances, suitable for regulated industries.

Professional Applications & Engineering Value

This M20 metric flat washer made from hard fiber is engineered to solve common industrial challenges such as galvanic corrosion, electrical isolation, and thermal management. Its black color and robust material provide excellent resistance to compression set and deformation, making it ideal for use in electrical enclosures, automotive assemblies, and machinery where non-conductive, durable spacing is critical. The precise 21mm ID and 37mm OD ensure easy installation with M20 screws, while the 2.1-2.5mm thickness offers reliable load distribution. By meeting DIN 125 standards, it delivers consistent performance in high-vibration and high-temperature environments up to 230°F, reducing maintenance needs and enhancing operational safety.

Specification Summary & Compliance

This flat washer features precise dimensions: 21mm inner diameter, 37mm outer diameter, and 2.1-2.5mm thickness, conforming to DIN 125 standards for dimensional accuracy and fit. It is manufactured from hard fiber with a Rockwell R50 hardness and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from restricted substances and safe for various industrial applications.