The Graco 166531 Non-Metallic Washer is a durable nylon friction washer used in valve and needle assemblies to ensure smooth adjustment and reduced wear.
The Graco 166531 Non-Metallic Washer is a durable friction washer used inside valve and needle assemblies. Its non-metallic nylon construction helps reduce wear, protect metal surfaces, and maintain smooth adjustment during operation.
This washer is essential for maintaining correct performance in compatible Graco pumps. It reduces friction, prevents premature wear, and helps protect precision surfaces inside the pump’s valve assembly.
Ensure the washer sits flat and properly aligned when reinstalling. Inspect nearby components such as the needle and packing for wear, and replace them if necessary for best performance.
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