| 摘要 |
A coiled spring is located in an annular space formed between a coupling nut and a body for locking the nut to the body when the nut is threaded in place. The coiled spring may have a metal core, a resilient core, or an air core. In other embodiments, the locking means may comprise a plurality of separate coiled springs located at spaced apart positions around a metal or resilient core.
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