S-91666A110 3.2 mm ID x 7 mm OD Plastic Washers

Key Features & Benefits at a Glance

• Exceptional heat resistance up to 300°F (149°C), ideal for demanding high-temperature environments without performance degradation.
• Superior corrosion resistance from PVDF plastic material, ensuring long-term reliability in harsh chemical or outdoor applications.
• Precise dimensional fit with 3.2mm ID and 7mm OD, designed specifically for M3 screws to prevent loosening and ensure secure fastening.
• Enhanced durability with Rockwell R93 hardness, providing excellent wear resistance and extended service life under mechanical stress.
• Regulatory compliance with RoHS 3 and REACH standards, guaranteeing safe use in industrial and electronic assemblies without hazardous substances.
• Lightweight and non-conductive properties, reducing overall assembly weight and eliminating risks of electrical shorts.
• Cost-effective maintenance due to material stability, minimizing replacement frequency and downtime in continuous operations.

Professional Applications & Engineering Value

This M3 PVDF plastic flat washer addresses critical engineering challenges in industries where temperature fluctuations and corrosive agents compromise fastener integrity. Its PVDF (Polyvinylidene Fluoride) construction delivers outstanding chemical inertness and thermal stability, preventing warping or embrittlement in applications like chemical processing equipment, automotive under-hood components, and electrical enclosures. The metric dimensions (3.2mm ID x 7mm OD) ensure precise alignment with M3 screws, distributing load evenly to avoid stress concentration and thread damage. By integrating this high-temperature washer, engineers achieve reliable sealing, vibration damping, and insulation in assemblies exposed to aggressive environments, reducing failure risks and maintenance costs.

Specification Summary & Compliance

Manufactured to metric system standards with an inner diameter of 3.2mm, outer diameter of 7mm, and thickness tolerance of 0.4-0.6mm for consistent fit. The washer complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety requirements. Material hardness is certified at Rockwell R93, supporting reliable performance in industrial fastening applications.