S-91367A122 21 mm ID x 37 mm OD Rubber Sealing Washers

Key Features & Benefits at a Glance

• Exceptional temperature resilience for reliable performance in extreme environments from -80°F to 450°F
• Superior chemical resistance with fluorosilicone rubber construction, ideal for harsh industrial applications
• Optimized sealing performance due to Durometer 60A hardness, ensuring effective leak prevention
• Precise dimensional fit with 21mm ID and 37mm OD, designed specifically for M20 screw assemblies
• Consistent thickness tolerance between 1.32mm and 1.82mm for uniform pressure distribution
• Compliance with environmental standards including RoHS 3 and REACH, supporting sustainable procurement
• High visibility blue color for easy identification and quality control during installation

Professional Applications & Engineering Value

This M20 metric flat washer made from fluorosilicone rubber addresses critical sealing challenges in demanding sectors such as automotive, aerospace, and chemical processing. Its wide temperature range from -80°F to 450°F ensures integrity under thermal cycling, while the Durometer 60A hardness provides optimal compression recovery for long-term industrial sealing applications. The material's inherent resistance to fuels, oils, and solvents combined with precise metric dimensions (21mm ID, 37mm OD) makes it an engineering solution for preventing fluid leakage and maintaining bolt tension in high-temperature environments.

Specification Summary & Compliance

Manufactured to metric system standards with an internal diameter of 21mm, outer diameter of 37mm, and thickness ranging from 1.32mm to 1.82mm for M20 screw compatibility. The fluorosilicone rubber construction meets Durometer 60A hardness specifications and operates within -80°F to 450°F. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial components.