Sorry Ron, didn't know its upsetting to ask simple questions again and again. I am a little dementiated though. However I always like your posts. Lim <blockquote type="cite">On 18-Apr-2012 8:49 PM, "Ron Nossaman" <<a href="mailto:rnossaman@cox.net">rnossaman@cox.net</a>> wrote: On 4/18/2012 4:13 AM, lim hock seng wrote: > > Thanks to all. Don, it make sense for Kawai rods.. Th... This is really a question that was needlessly asked. Anyone having any idea what a lock nut does and how it works will look at what is there and see immediately where to tighten the nut without needing to memorize what manufacturer does what through which time period in which models to what detail. This is realistically about as simple as it gets with mechanics. Ron N </blockquote>