Additional

Nyloc nuts (or lock nuts) -->Are a kind of nut that includes a ring of nylon inside the thread. They are designed to increase locking force and prevent the nut from coming loose. The internal nylon ring has no threads cut into it; it is forced to deform around the threads as the nut is twisted on, ensuring a tight grip on the thread. In most applications, this type of nut cannot be reused after being removed.
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Jam nut --> inserting smaller nut first then followed by bigger nut for being more fasten, This method is called 'Jam nut'.