S-91225A311 3.2 mm ID x 6.8 mm OD Plastic Washers

Key Features & Benefits at a Glance

• Superior heat resistance up to 250°F, ensuring reliable performance in high-temperature environments without degradation
• Excellent electrical insulation properties due to phenolic plastic material, preventing short circuits and enhancing safety in electrical assemblies
• High hardness rating of Rockwell M105 provides exceptional durability and resistance to wear, extending service life in demanding applications
• Precise metric sizing (3.2mm ID, 6.8mm OD) ensures perfect fit with M3 screws, reducing installation errors and improving assembly efficiency
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and meets international standards for hazardous substance restrictions
• Minimal thickness variation (0.4-0.6mm) allows for consistent spacing and load distribution, critical for precision engineering applications
• Lightweight phenolic construction reduces overall component weight while maintaining strength, ideal for applications where weight savings are essential

Professional Applications & Engineering Value

This M3 phenolic plastic flat washer is engineered to address common industrial challenges, such as thermal management and electrical safety. The phenolic plastic material offers inherent electrical insulation, making it ideal for use in electronic devices, control panels, and automotive systems where preventing current leakage is critical. Its ability to withstand temperatures up to 250°F ensures stability in high-heat environments, such as near motors or heating elements, reducing the risk of material failure. The flat washer design and precise metric dimensions provide uniform load distribution and secure fastening with M3 screws, minimizing loosening under vibration. Commonly applied in thermal-resistant and electrical insulation scenarios, this washer enhances reliability in industries like aerospace, manufacturing, and consumer electronics, delivering long-term performance without compromising safety.

Specification Summary & Compliance

This washer features an inner diameter of 3.2mm, outer diameter of 6.8mm, and thickness ranging from 0.4-0.6mm, designed for M3 screw sizes with metric system compatibility. It adheres to standard dimensional tolerances for flat washers and is manufactured from phenolic plastic with a hardness of Rockwell M105. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety requirements for hazardous substances.