S-93785A814 0.531" ID x 1.375" OD ASME B18.21.1 Plastic Washers

Key Features & Benefits at a Glance

• Exceptional thermal stability for reliable performance in extreme environments from -20°F to 500°F
• Superior chemical and wear resistance due to high-performance PEEK plastic construction with Rockwell M103 hardness
• Precise dimensional fit with 0.531" ID and 1.375" OD ensuring optimal load distribution for 1/2" screws
• Consistent thickness control (0.064-0.104") providing uniform clamping force and vibration resistance
• Industry-standard compliance with ASME B18.21.1 specifications for guaranteed interchangeability and quality
• Environmental regulation adherence through RoHS 3 and REACH compliance for global supply chain compatibility
• Corrosion-free performance in harsh conditions where metal washers would degrade or fail

Professional Applications & Engineering Value

This PEEK plastic flat washer delivers critical engineering solutions for demanding industrial environments where temperature extremes, chemical exposure, and electrical insulation are primary concerns. The high-temperature resistance (up to 500°F) makes it ideal for automotive, aerospace, and chemical processing equipment where thermal cycling would compromise conventional materials. Its excellent dielectric properties provide reliable electrical isolation in electronic assemblies and power distribution systems. The ASME B18.21.1 compliance ensures dimensional precision for 1/2" screw applications, eliminating installation issues while the chemical inertness of PEEK prevents degradation in corrosive environments, significantly extending maintenance intervals and reducing downtime in critical operations.

Specification Summary & Compliance

This flat washer maintains precise dimensional tolerances per ASME B18.21.1 standards with 0.531" inner diameter, 1.375" outer diameter, and thickness ranging 0.064-0.104" for consistent performance with 1/2" fasteners. The manufacturing process adheres to strict quality controls ensuring dimensional stability and material integrity. Compliance certifications include RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) for environmental safety, making these washers suitable for global industrial applications requiring regulatory adherence.