S-95647A207 0.125" ID x 0.438" OD Plastic Washers

Key Features & Benefits at a Glance

• Superior chemical resistance prevents degradation from oils, solvents, and many industrial chemicals, extending service life in harsh environments.
• Excellent dimensional stability maintains precise fit and function across a wide temperature range from -40°F to 180°F.
• Low friction and high wear resistance reduce galling and wear on mating surfaces, protecting both the fastener and the application material.
• High Durometer 83D hardness provides reliable load distribution and vibration resistance for secure, long-lasting assemblies.
• RoHS 3 and REACH compliance ensures environmental safety and unrestricted use in global markets and sensitive applications.
• Electrical insulation properties prevent galvanic corrosion and are ideal for use in electronic assemblies.
• Precision inch dimensions (0.125" ID, 0.438" OD) ensure a perfect fit for No. 4 screws, simplifying inventory and installation.

Professional Applications & Engineering Value

Engineered for demanding applications, these Delrin® Acetal Plastic flat washers solve critical engineering challenges where metal fasteners fail. The inherent properties of acetal plastic provide exceptional resistance to corrosion, chemicals, and repetitive stress, making them ideal for electrical enclosures, food processing equipment, and automotive components. Their low moisture absorption and consistent performance from -40°F to 180°F prevent brittleness and deformation, ensuring reliability in thermal cycling environments. The white color and clean material are suitable for applications requiring high visibility or contamination control. By distributing load effectively and providing a low-friction bearing surface, they protect sensitive materials and reduce maintenance frequency, delivering long-term engineering value and cost savings.

Specification Summary & Compliance

This flat washer conforms to standard inch dimensions with an Inside Diameter (ID) of 0.125", Outside Diameter (OD) of 0.438", and a Thickness of 0.054-0.070", designed specifically for a No. 4 screw size. The material is Delrin® Acetal Plastic with a Durometer 83D hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances and safe for use in regulated industries.