Difficulties installing & torquing rear drum - Help!

[psogden]

Update. Cleaned axle threads a bit using Blue Point tool. Then, using correct 5/8” - 18 good used Ford nuts obtained from unidentified source, was able to torque both rear drums to 175 FPs. As suggested by John (JM 35 Sedan), will drive the car a bit, then add 10 FPs repeating until I reach 200. Thanks again to everybody for your input.