S-90295A440 0.252" ID x 0.472" OD Plastic Washers

Key Features & Benefits at a Glance

• Excellent chemical resistance ensures long-term reliability in harsh industrial environments without corrosion or degradation.
• Superior electrical insulation properties prevent electrical conductivity, enhancing safety in electronic and electrical assemblies.
• Wide operating temperature range from -40°F to 180°F maintains performance and dimensional stability under extreme thermal conditions.
• High Rockwell R115 hardness provides consistent load distribution and resistance to deformation under pressure.
• Precise inch-system dimensions (0.252" ID, 0.472" OD) ensure perfect fit and alignment with No. 12 screws, reducing installation errors.
• Lightweight nylon plastic construction reduces overall assembly weight while offering durability comparable to metal washers in non-structural applications.
• Full compliance with RoHS 3 and REACH regulations guarantees environmental safety and suitability for global industrial supply chains.

Professional Applications & Engineering Value

This Nylon Plastic Flat Washer is engineered to address common challenges in industrial fastening, such as galvanic corrosion, electrical isolation, and chemical exposure. Made from durable nylon material, it serves as an ideal electrical insulation washer in control panels, machinery, and automotive systems, preventing short circuits. Its chemical resistance makes it suitable for use in processing plants where exposure to oils, solvents, or mild acids occurs. The flat washer design with precise 0.252" ID and 0.472" OD ensures secure seating under No. 12 screws, distributing load evenly to protect sensitive surfaces and extend fastener life in industrial washers applications.

Specification Summary & Compliance

This washer adheres to standard inch-system dimensions with an inner diameter of 0.252", outer diameter of 0.472", and thickness ranging from 0.055" to 0.070", designed specifically for No. 12 screw sizes. It meets industry standards for material performance, including a Rockwell R115 hardness rating and an operational temperature range of -40°F to 180°F. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in regulated industrial and consumer goods.