What Is a Jam Nut?

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When it comes to varieties of nuts and bolts, it can be tough to remember the functions and uses for each. A jam nut plays an invaluable role for moments when a standard nut just won't do the trick.

Definition

  • A jam nut is a thin nut that jams against another locking it in place and preventing another nut from moving. It is most commonly used in situations where larger, more standard-sized nuts will not fit.

Functions

  • A jam nut comes in handy when you need to lock an item in place using a nut without the support of a second object. The jam nut is used as the "second object." A jam nut is also used to secure an item without applying any force to it.

Benefits

  • Using a jam nut eliminates the need to introduce a second, unnecessary object simply for fastening purposes. Now, whatever you are trying to join together can be done simply by incorporating this one small nut.

Size

  • Jam nuts are small, coming in at half the height of a standard nut. It measures in at 5/8 inches on average.

Use

  • Contrary to common usage, the lock nut should be put on the inside of the nut you are trying to lock down.

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