S-93785A820 0.406" ID x 1" OD ASME B18.21.1 Plastic Washers

Key Features & Benefits at a Glance

• Exceptional thermal performance with a wide operating range from -20°F to 500°F, ensuring reliable function in extreme temperature environments
• Superior chemical resistance due to the PEEK plastic material, protecting against corrosion and degradation in harsh industrial settings
• High mechanical strength and durability with Rockwell M103 hardness, providing excellent load distribution and long service life
• Precision dimensional fit with 1" OD and 0.406" ID, specifically engineered for secure mounting on 3/8" screws
• Compliance with industry standards including ASME B18.21.1, ensuring consistent quality and interchangeability
• Environmental and safety compliance with RoHS 3 and REACH regulations, making them suitable for global supply chains
• Consistent thickness tolerance between 0.064" and 0.104" for uniform pressure distribution and reliable sealing performance

Professional Applications & Engineering Value

This PEEK plastic flat washer delivers critical engineering value in demanding applications where traditional metal washers fail. Its high-temperature rating up to 500°F makes it ideal for automotive, aerospace, and chemical processing equipment exposed to thermal cycling. The chemical-resistant properties of PEEK material prevent degradation from oils, solvents, and aggressive chemicals, solving common failure points in corrosive environments. With its ASME B18.21.1 compliance and precise dimensions for 3/8" screw applications, this washer ensures proper fit and function in assembly operations. The black color provides consistent identification, while the Rockwell M103 hardness maintains structural integrity under vibration and load conditions, making it a reliable choice for critical industrial fastening systems.

Specification Summary & Compliance

This flat washer features inch system dimensions with 1" OD, 0.406" ID, and thickness range of 0.064-0.104" specifically designed for 3/8" screw applications. Manufactured to ASME B18.21.1 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use in regulated industries. Temperature capabilities range from -20°F to 500°F maximum, with material hardness rated at Rockwell M103 for consistent mechanical performance.