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locknut : ウィキペディア英語版
locknut

A locknut, also known as a lock nut, locking nut, prevailing torque nut,〔.〕 stiff nut〔 or elastic stop nut, is a nut that resists loosening under vibrations and torque. Elastic stop nuts and prevailing torque nuts are of the particular type where some portion of the nut deforms elastically to provide a locking action. The first type used fiber instead of nylon and was invented in 1931.〔("Nut With Elastic Ring Can't Work Loose", April 1931, Popular Science ) bottom of page 67 drawing of how lock nuts work〕
Locknuts, jam nuts, lock washers, and thread-locking fluid are ways to prevent vibration from loosening a bolted joint.
==Types==

There are various kinds of specialised lock nuts, including:
* Castellated nut
* Distorted thread locknut
*
*Centerlock nut
*
*Elliptical offset locknut
*
*Toplock nut
*
*Philidas nut
* Interfering thread nut
*
*Tapered thread nut
* Jam nut
* Jet nut (K-nut)〔.〕
* Keps nut (K-nut or washer nut) with a free-spinning washer. In the locknut form, this is a star-type lock washer.
* Plate nut
* Polymer insert nut (Nyloc nut)
* Security Lock Nut All steel reusable nut for high vibration and harsh environments.
* Serrated face nut
* Serrated flange nut
* Speed nut (sheet metal nut or Tinnerman nut)
* Split beam nut
* Palnut

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「locknut」の詳細全文を読む



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