And I have it correct that the Zerks on the spindles are the 1/8 NPT, not 1/4 - 28 taper?
Looking again at McMaster-Carr I now see the "1/8 NPT 27 TPI" under the Pipe and Conduit section. Tap diameter is 0.332 which seems correct. They don't carry a bottoming chamfer so yea, I might have to grind off some of the lead. Wow, $35 per tap! Hopefully, available at local HW store.
