According to jim rozen :
In article , DoN. Nichols says...

If you've got a lathe, I would suggest turning the 1/8" brass
down to 0.138" for the threads, ...

Hmm. Maybe you mean "knurl up," instead of "turn down?"

Oops -- you're right. However, I don't think that increasing
the diameter by kurling would do much good here. You could simply cut
less than full height threads with a die.

Thanks,
DoN.

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