Lim asked: "Usually I locked the 2 nuts together but I have seen the lower nut tightened to the rod. Which is correct? Thanks from Lim" Lim, The key phrase is "Lock Nuts". Or, some people call them Jam Nuts. The idea is to "jam" one nut against the other, thereby they will bind on the threaded shaft. Most of the time this works as designed. However, if the two nuts are perfectly mated, then they become one and will still pivot on the shaft. If this occurs, then add a thin washer between the two nuts. Regards, Joe Joe Garrett, R.P.T. Captain of the Tool Police Squares R I
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