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Interfering thread nut
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<p>An interfering thread nut is a type of <a href="/facts/Locknut/WJL0tRKM">locknut</a> that has an undersized root diameter. This creates an interference between the <a href="/facts/Nut_(hardware)/RvmcvYH8">nut</a> and the fastener, <a href="/facts/Plastic_deformation/z1LEmkQX">plastically deforming</a> the <a href="/facts/Screw_thread/dqGzDfHv">threads</a> on the fastener. Due to this deformation they are usually only used on permanent or semi-permanent installations. </p><p>A variation of this nut is the tapered thread nut. It utilizes a tapered thread to achieve the interference. The nut goes on easily, because the thread diameter starts at a standard size; as the nut is further threaded on it begins to lock, much like a <a href="/facts/Distorted_thread_locknut/PB0BB4IM">distorted thread locknut</a>. </p>