S-91435A220 0.406" ID x 1" OD ASTM D5213 Plastic Washers

Key Features & Benefits at a Glance

• Exceptional thermal stability for reliable performance in extreme environments ranging from -450°F to 750°F
• Precision dimensional accuracy with 1" OD and 0.406" ID ensuring perfect fit for 3/8" screws
• Ultra-thin profile (0.005-0.006" thickness) ideal for space-constrained applications without compromising performance
• Material integrity through polyimide plastic construction maintaining properties under severe thermal cycling
• Compliance assurance with ASTM D5213 standards for consistent quality and material performance
• Chemical resistance inherent to polyimide material for durability in harsh industrial environments
• Visual identification through amber color coding for easy installation and inventory management

Professional Applications & Engineering Value

Engineered for extreme temperature applications, this polyimide plastic flat washer solves critical thermal management challenges in aerospace, semiconductor, and industrial processing equipment. The polyimide material maintains dimensional stability and mechanical properties across the widest temperature range (-450°F to 750°F) available in plastic washers, preventing thermal deformation that compromises seal integrity. The precision inch system dimensions (1" OD x 0.406" ID) ensure perfect alignment with 3/8" screws while the ultra-thin profile accommodates tight tolerances in advanced assemblies. This ASTM D5213 compliant washer delivers consistent performance where conventional plastics fail, making it essential for cryogenic systems, high-temperature processing, and thermal cycling applications requiring reliable insulation and spacing solutions.

Specification Summary & Compliance

This flat washer features precision dimensions of 1" OD x 0.406" ID with thickness tolerance of 0.005-0.006" for 3/8" screw size applications. Manufactured from polyimide plastic in amber color using the inch system of measurement. The product complies with ASTM D5213 material specifications and is designed for temperature applications ranging from -450°F to 750°F. While hardness is not rated, the material maintains exceptional performance characteristics throughout the specified temperature range, suitable for demanding industrial environments requiring reliable thermal and chemical resistance properties.