Captain Emo,
The correct tap to clean up the threads in a 1940 is 3/16x32 TPI. This is not a common thread size but can be found at the larger machine tool supply houses i/e Travers Tool Co.
If you don't want to attempt this yourself, you can send me your frame and I will do it for you free of charge but it will cost you shipping both ways. The frame will have to be sent by UPS or Fedex 2nd day air (their regulations) and will be costly.
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TRUMP FOR PREZ IN '20!
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