S-90718A120 3.2 mm ID x 7 mm OD UL 94 HB Plastic Washers

Key Features & Benefits at a Glance

• Enhanced Durability & Strength: Glass-filled nylon construction provides superior mechanical properties and impact resistance compared to standard plastic washers, extending service life in demanding environments.
• Reliable High-Temperature Performance: Withstands continuous exposure up to 220°F, ensuring dimensional stability and functionality in thermally challenging applications.
• Excellent Vibration Resistance: The inherent damping properties of the material help prevent fastener loosening, maintaining secure assemblies under dynamic loads.
• Superior Electrical Insulation: Non-conductive plastic material makes these washers ideal for preventing electrical shorts and protecting sensitive electronic components.
• Lightweight & Corrosion-Proof: Offers a significant weight reduction over metal alternatives and is completely immune to rust and galvanic corrosion.
• Certified Material Safety: Compliant with RoHS 3 and REACH regulations, ensuring they are free from hazardous substances for global supply chain compatibility.
• Flame Retardant Certification: Meets the UL 94 HB standard, providing a recognized level of flammability safety for various industrial uses.

Professional Applications & Engineering Value

This M3 metric flat washer is engineered to solve critical challenges in precision assembly. The glass-filled nylon plastic material delivers an optimal balance of strength and resilience, making it an ideal replacement for metal washers where electrical insulation, weight reduction, and corrosion resistance are paramount. Its 3.2mm ID and 7mm OD ensure a perfect fit for M3 screws, distributing load effectively to prevent surface damage and embedment. In industries from automotive electronics to consumer appliances, these washers provide reliable vibration resistance, maintain integrity at elevated temperatures, and help assemblies meet stringent international safety and environmental standards like UL 94 HB and RoHS, reducing long-term maintenance and failure risks.

Specification Summary & Compliance

This flat washer conforms to metric dimensional standards with an Inside Diameter (ID) of 3.2mm and an Outside Diameter (OD) of 7mm, designed for M3 screw sizes. The material, glass-filled nylon, has a hardness of Rockwell M111. It is certified to meet the UL 94 HB flammability standard and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to global environmental and safety directives for industrial components.