Locking Nut With Stress-Distributing Insert
An improved locking nut comprises (1) an internally threaded shell, partly resembling a conventional nut, that can be engaged by a wrench or other tool, and (2) an internally and externally threaded insert that engages the threads of the shell and a bolt. Whereas some prior locking nuts are plated over their entire surfaces for lubrication and prevention of galling caused by engagement of threaded surfaces, this nut includes plating (silver or other soft material) only on the threaded surfaces of the insert, which, during engagement, are enclosed. The elimination of external plating reduces the likelihood of contaminating adjacent equipment.
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