MIMF

Does anyone on here know what the truss rod thread size is for a Geddy Lee Jazz Bass? I want to swap out the regular adjustment nut for the Stew Mac spoke wheel, just not sure if it will fit.

Thanks
Dan

If all else fails, you can remove the existing one, take it to a hardware store, and try it on different bolts until you find the diameter and thread that fits.

JC,
That's the simplest and most obvious solution to Dan's problem.

Dan,
Do what JC suggested. I do it all the time when I am trying to match any kind of screw thread or nut to another part--guitar part, furniture part, gun part, whatever. It is so simple! Once you find the required size, then call or email StewMac. They will be glad to help.

IIRC all of StewMacs truss rod nuts are 10-32 thread, Fender could be using 12-28 or 10-32 (I've asked them and they didn't even know that some of their basses came with 12-28 threads) Unfortunately Fender had a bad habit in the early 90's of jamming the 12-28 nuts onto the 10-32 rods so even if the nut is threaded 12-28, the rod might still be 10-32. Note that you will have to carve out a counterbore for the spoke wheel nut. While you are at it you might as well figure out what is wrong with your current truss rod nut. My guess is that it needs a washer or two behind it because you ran out of threads on the rod due to wood compression. Even if you didn't run out of threads you should order the special StewMac washers because you will need them eventually. Keep in mind that modifying the neck for a spoke wheel nut will probably destroy most of it's resale value.