Nylon top hat washers are multi-functional t-shaped plastic fasteners. They combine a traditional flat washer head (the "brim") with a cylindrical integrated sleeve (the "crown").
Principal Functions
Galvanic Corrosion Isolation: They form a non-conductive, physical barrier that separates dissimilar metals (e.g., steel bolts clamping down onto aluminium sheets), completely arresting destructive electrolytic ion exchange.
Low-Friction Sleeve Bearings: In mechanical pivot linkages, the low-friction surface allows the internal bore to double smoothly as an integrated rotary sliding bearing.
Geometry Definitions
Inside Diameter (ID): Sized cleanly to accommodate standard metric bolt shanks (ranging broadly from M3 up to M36).
Shoulder/Sleeve Diameter: Sized to match the clear clearance installation hole drilled into the host panel piece.
Shoulder Length: Dictates the depth of panel thickness protection; standard ranges are engineered to mimic standard industrial clearance configurations.
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