Distorted thread locknut: Difference between revisions

Revision as of 23:11, 5 May 2012

Revision as of 21:38, 1 December 2012

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A '''distorted thread locknut''',<ref name="McMaster3139">McMaster, p. [http://www.mcmaster.com/#catalog/114/3139 3139].</ref> is a type of [[locknut]] that uses a deformed section of [[screw thread|thread]] to keep the [[nut (hardware)|nut]] from loosening from vibrations or rotation of the clamped item. They are broken down into threefour types: '''elliptical offset nuts''', '''centerlock nuts''', '''toplock nuts''' and '''toplockpartially depitched nuts'''.

Because these nuts are solid metal, they are effective in elevated temperature settings, unlike [[nyloc nut]]s. High [[Bolted joint#Property class|grade]] nuts are good up to {{convert|1400|F|C|abbr=on}}. High strength distorted thread nuts cannot be used with low strength fasteners because the hard nut will act like a [[tap and die|die]] and destroy the threads on the fastener.<ref name="smith"/>

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==Toplock nuts==

Toplock nuts are also similar to elliptical offset nuts, except that the whole thread on one end is not distorted. Instead only three small sections of the thread are deformed on one end.<ref name="McMaster3139"/>

==Partially depitched nuts==

Partially depitched nuts are commonly called Philidas nuts, <ref>{{Citation | title = Philidas nut | url = http://www.philidaslimited.co.uk/home.html | accessdate = 2012-12-01}}.</ref>after their originator and current manufacturer, and differ from the above three nut types insofar as a portion of the thread is displaced axially, this being facilitated by one or more slots perpendicular to the axis.

==See also==