locknut

Definition of Locknut in English :

1. locknut, safety nut

supplementary nut that is screwed down on a primary nut to prevent it from loosening

WordNet Lexical Database for English. Princeton University. 2010.

Locknut

noun

1.

a supplementary nut screwed down upon a primary nut to prevent it from shaking loose

2.

a threaded nut having a feature, such as a nylon insert, to prevent it from shaking loose

noun

1.

a thin nut screwed down hard on an ordinary nut to prevent the latter from working loose

2.

a specially designed nut that locks itself when screwed down tight

: also lock nut

n.

1. A usually thin nut screwed down on another nut to prevent it from loosening.

2. A self-locking nut.