S-91435A230 0.281" ID x 0.687" OD ASTM D5213 Plastic Washers

Key Features & Benefits at a Glance

• Exceptional thermal stability for reliable performance in extreme environments from -450°F to 750°F
• Superior dimensional precision with 0.281" ID and 0.687" OD ensures perfect fit for 1/4" screw applications
• Outstanding material durability using polyimide plastic that maintains integrity under harsh industrial conditions
• Compliance with ASTM D5213 standards guarantees consistent quality and material performance
• Excellent electrical insulation properties provides additional protection in electrical applications
• Ultra-thin profile (0.005-0.006" thickness) allows for space-constrained installations without compromising performance
• Amber color coding enables easy identification and inventory management in complex assemblies

Professional Applications & Engineering Value

This high-temperature polyimide plastic flat washer delivers exceptional engineering value in demanding industrial applications where thermal management is critical. The polyimide material maintains structural integrity across an unprecedented temperature range from cryogenic -450°F to extreme heat at 750°F, solving common failure points in aerospace, semiconductor manufacturing, and automotive systems. The precise 0.281" ID x 0.687" OD dimensions ensure secure fastening for 1/4" screw sizes while the ultra-thin profile accommodates tight spaces in precision equipment. Engineered to meet ASTM D5213 specifications, this washer provides reliable insulation and vibration damping in electrical assemblies, chemical processing equipment, and high-temperature machinery where metal washers would fail due to thermal expansion or corrosion.

Specification Summary & Compliance

This flat washer features precision inch system dimensions with 0.281" internal diameter, 0.687" outer diameter, and controlled thickness between 0.005-0.006". Manufactured from amber-colored polyimide plastic specifically engineered for extreme temperature applications ranging from -450°F to 750°F. The product complies with ASTM D5213 material specifications and is designed for use with 1/4" screw sizes. While hardness is not rated, the material demonstrates exceptional thermal and chemical resistance suitable for demanding industrial environments.