TorontoBuilder
Sapientia et Doctrina Stabilitas
That appears to be the snap on thread repair tool TR-20I have lots of large taps and dies. Here’s a handful I pulled out of the bottom drawer. View attachment 55176
Nothing unusual about these. But the pics below are of an unusual thread cutting device that is used to clean-up existing threads not cut new threads. Often in the field you only need to make old damaged threads have a new lease on life.
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It will clear up dozens of thread pitches up to 4” in diameter.
Here’s another tool I’ve had for a long time but it has seen little use since getting out of the drilling business. Its a rather specialized puller.
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