Grinding a small Internal Trapezoidal threading tool

[Wongster]

Thanks Tom.

May I know how I can "swage the existing nut....."?

I did order a tap for the nut which I think will only reach me a week or 2 after chinese new year. Buying from china is a hit and miss affair, so I'm not counting on it to achieve a better fit. If it does, I'll be happy. If it isn't, no big deal; its only a few dollars.

I watched some videos on making such taps using identical leadscrew as the tap. I don't have those grinding and cutting wheels. Maybe I can use my bench grinder for that after milling the slot on the mill.

Regards,
Wong