Locknut
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(Redirected from Locking nut)
A locknut, also known as a lock nut, locking nut, prevailing torque nut,[1] stiff nut[1] or elastic stop nut,[2] 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.[2] The first type used fiber instead of nylon and was invented in 1931. [3]
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[edit] Types
There are various kinds of specialised lock nuts, including:
- Castellated nut
- Distorted thread locknut
- Interfering thread nut
- Jam nut
- Jet nut (K-nut)[4]
- Keps nut (K-nut or washer nut) with a free-spinning washer. In the locknut form, this is a star-type lock washer.
- Nyloc plate nut
- Polymer insert nut (Nyloc)
- Serrated face nut
- Serrated flange nut
- Speed nut (Sheet metal nut or Tinnerman nut)
- Split beam nut
[edit] See also
[edit] References
[edit] Notes
- ^ a b Glossary of Terminology Related to Nuts and Bolts, http://www.boltscience.com/pages/glossary.htm, retrieved 2008-11-30.
- ^ a b Smith, p. 104.
- ^ "Nut With Elastic Ring Can't Work Loose", April 1931, Popular Science bottom of page 67 drawing of how lock nuts work
- ^ K-NUTS.com, http://k-nuts.com, retrieved 2012-03-01.
[edit] Bibliography
- Smith, Carroll (1990), Carroll Smith's Nuts, Bolts, Fasteners, and Plumbing Handbook, MotorBooks/MBI Publishing Company, ISBN 0879384069, http://books.google.com/?id=A81HmmRCN7YC.
[edit] External links
- "Hold Everything", February 1946, Popular Science page on lock nuts and washer technology developed during World War Two
