- Joined
- Sep 2, 2013
- Messages
- 379
This tool from Mesa tool can do Left or Right hand threads both internal and external.
https://www.mesatool.com/product-page/5-8-thread-grooving-tool-id-od-gt
https://www.mesatool.com/product-page/5-8-thread-grooving-tool-id-od-gt