S-93785A817 0.25" ID x 0.562" OD ASME B18.21.1 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 thermal stability with a wide operating range from -20°F to 500°F, ensuring reliable performance in extreme temperature environments
- Superior chemical and wear resistance thanks to PEEK plastic construction, providing long-lasting durability in harsh industrial conditions
- Precision dimensional fit with 0.25" ID and 0.562" OD specifically designed for No. 12 screws, ensuring secure fastening and load distribution
- Consistent mechanical performance with Rockwell M103 hardness, maintaining structural integrity under pressure and vibration
- Compliance with international standards including ASME B18.21.1, guaranteeing manufacturing precision and interchangeability
- Environmental and safety compliance with RoHS 3 and REACH regulations, making them suitable for sensitive and regulated applications
- Optimized thickness range of 0.051-0.080" providing reliable spacing and tension control in assembled components
Professional Applications & Engineering Value
These PEEK plastic flat washers deliver critical engineering solutions where standard metal washers fail. The high-temperature resistance makes them ideal for automotive, aerospace, and chemical processing equipment exposed to thermal cycling. Their excellent dielectric properties and corrosion resistance prevent galvanic corrosion when used with dissimilar metals, extending assembly life. The precise inch dimensions and ASME B18.21.1 compliance ensure perfect fit with No. 12 screws, eliminating loosening in vibrating environments. The black PEEK material maintains dimensional stability across the full temperature range, preventing deformation under load while meeting strict RoHS 3 and REACH compliance for electronics and medical applications.
Specification Summary & Compliance
Manufactured to ASME B18.21.1 specifications with precise dimensional tolerances for consistent performance. The 0.25" ID x 0.562" OD configuration ensures proper fit for No. 12 screw applications with thickness maintained between 0.051-0.080". Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and restricted substance adherence for global industrial use.
