S-95649A430 21 mm ID x 37 mm OD Plastic Washers
Plastic Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Exceptional chemical resistance for reliable performance in corrosive industrial environments
- Low friction coefficient reduces wear on mating surfaces and extends component lifespan
- 180°F temperature tolerance maintains structural integrity in moderate heat applications
- Precision metric dimensions (21mm ID x 37mm OD) ensure perfect fit with M20 fasteners
- UHMW plastic construction provides superior impact strength and durability versus standard plastics
- RoHS 3 & REACH compliance meets strict international environmental and safety standards
- Consistent 3.0-3.3mm thickness delivers reliable load distribution and vibration dampening
Professional Applications & Engineering Value
This UHMW plastic flat washer solves critical engineering challenges in demanding industrial settings. The ultra-high molecular weight polyethylene material delivers exceptional chemical resistance against acids, alkalis, and solvents, making it ideal for chemical processing equipment, food machinery, and marine applications. Its low coefficient of friction prevents galling and seizing on M20 metric fasteners, while the off-white color provides visual contrast for inspection in low-light conditions. The washer's 3.0-3.3mm consistent thickness ensures uniform load distribution across 21mm ID and 37mm OD contact surfaces, protecting expensive components from vibration-induced damage and surface deformation in assembly operations.
Specification Summary & Compliance
This metric flat washer features precision dimensions with 21mm internal diameter, 37mm outer diameter, and 3.0-3.3mm thickness range, engineered for compatibility with M20 screw sizes. Manufactured from UHMW plastic with off-white coloration, the washer maintains dimensional stability across its operational range. The product fully complies with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) standards regarding substance restrictions, ensuring environmental responsibility and workplace safety in global industrial applications.
