Fender Precision Plus (USA 1991) truss rod nut
Excellent, for two reasons. The hex drive socket is twice as deep as the original/stock issue which means it is far less likely to round-off or slip with use. Secondly, the internal thread, which the truss rod screws into, runs the whole length up to the hex socket. The thread of the original only ran half the length of the nut which meant you quickly ran out of threads/adjustment.
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