Here's some details:
- The cranks are older style fluted pista cranks from the 80's
- I'm the second owner.
- The threads do engange.
- I can only finger tighten them one turn
- I can tighten them all the way in with a pedal wrench, but it takes maximum effort and results in a high pitch sqeaking sound. (I'm assuming that's the threads.)
- I have never put any other pedals in them.