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jam nut

American  

noun

  1. lock nut.


Etymology

Origin of jam nut

First recorded in 1860–65

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

To increase the speed of the engine loosen this jam nut and take hold of the thumb nut and turn it back slowly, watching the motion of your engine all the while.

From Rough and Tumble Engineering by Maggard, James H.

The second nut is a loose jam nut.

From Rough and Tumble Engineering by Maggard, James H.

If the jam nut has worked loose, the governor will run as usual, except that it will increase its speed as the speed of the engine is increased.

From Rough and Tumble Engineering by Maggard, James H.

The eccentric, when in two pieces, is retained at its proper angle on the shaft by a pinching screw, which is provided with a jam nut to prevent it from working loose.

From A Catechism of the Steam Engine by Bourne, John, C.E.

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