S-96371A203 0.312" ID x 0.625" OD Plastic Sealing Washers

Key Features & Benefits at a Glance

• Extreme temperature resilience for reliable performance from -200°F to +400°F, ensuring stability in harsh thermal environments
• Superior chemical and corrosion resistance thanks to ePTFE plastic material, extending service life in aggressive industrial settings
• Consistent load distribution and vibration dampening with Durometer 40A hardness, protecting fastened components from damage
• Precise dimensional fit for 5/16" screws (0.312" ID, 0.625" OD), reducing installation errors and improving assembly efficiency
• RoHS 3 compliance for environmentally safe use in regulated industries and global market access
• Lightweight and non-conductive properties for applications requiring electrical insulation and weight reduction
• Durable, low-friction surface to prevent galling and simplify maintenance in high-cycle operations

Professional Applications & Engineering Value

Engineered for demanding conditions, these ePTFE plastic flat washers excel in extreme temperature applications ranging from cryogenic cooling to high-heat processing. The ePTFE material provides exceptional resistance to chemicals, acids, and solvents, making them ideal for chemical processing, oil and gas, and aerospace industries where corrosion failure is a critical concern. Their Durometer 40A hardness ensures optimal sealing and load distribution under 5/16" screw fastening, reducing stress concentration and preventing loosening due to vibration. With a white color for easy identification and compliance with RoHS 3, these washers support long-term reliability in assemblies exposed to thermal cycling and harsh environments, minimizing downtime and replacement costs.

Specification Summary & Compliance

This flat washer meets precise dimensional standards with an inner diameter of 0.312", outer diameter of 0.625", and thickness ranging from 0.035" to 0.070", designed for 5/16" screw size in the inch system. It conforms to RoHS 3 (2015/863/EU) compliance, ensuring adherence to environmental regulations. The material—ePTFE plastic—maintains integrity across a broad temperature range from -200°F to 400°F, with a hardness of Durometer 40A for consistent performance in industrial applications.