S-98594A416 10.5 mm ID x 21 mm OD Plastic Washers

Key Features & Benefits at a Glance

• Excellent corrosion resistance from polypropylene plastic, ideal for humid or chemical environments without rusting or degradation.
• Durable performance with Rockwell R100 hardness, maintaining shape and function under repeated load and vibration.
• Reliable insulation properties for electrical applications, preventing galvanic corrosion and short circuits.
• Lightweight and cost-effective compared to metal washers, reducing assembly weight and material costs.
• Wide temperature tolerance up to 150°F, suitable for various industrial settings without losing integrity.
• Precise M10 metric sizing with 10.5mm ID and 21mm OD, ensuring secure fit and even load distribution.
• Full regulatory compliance with RoHS 3 and REACH, meeting strict environmental and safety standards for global supply chains.

Professional Applications & Engineering Value

This M10 metric flat washer made from polypropylene plastic addresses common industrial challenges like corrosion, electrical conductivity, and weight management. Its off-white color and non-metallic composition make it perfect for applications requiring electrical insulation or resistance to moisture and chemicals, such as in electrical enclosures, plumbing systems, and food processing equipment. The Rockwell R100 hardness ensures it withstands vibration and compressive forces without cracking, while the precise 10.5mm ID and 21mm OD dimensions provide a snug fit for M10 screws, distributing load evenly to prevent surface damage. Ideal for industrial washers in automotive, marine, and consumer goods, it offers a reliable, lightweight alternative to metal, reducing maintenance and enhancing product lifespan in demanding environments.

Specification Summary & Compliance

This flat washer features metric dimensions with an inner diameter of 10.5mm, outer diameter of 21mm, and thickness ranging from 1.7–2.3mm, designed for M10 screw sizes. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use. The polypropylene material and Rockwell R100 hardness provide consistent performance, with a maximum temperature resistance of 150°F, meeting general engineering requirements for durability and environmental safety.