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The Minerallac 40615J is a #10 internal tooth lock washer. This fastener is designed to create a locking action by digging into both the fastener head and the mating surface, preventing loosening under vibration. It is zinc-plated for corrosion resistance and comes packaged in a jar for convenient storage and dispensing.
Internal tooth lock washers are designed to create a locking action, preventing loosening under vibration.
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