iver johnson barrel thread tpi

[rustymaggot]

i need to know what thread iver johnson model 50 sidewinder barrels are, and more importantly i need to know where to get a die to cut them. best i can tell so far it is a 7/16 with a unknown tpi.

 

[rustymaggot]

model 50 sidewinder revolver iver johnson

ok, for anyone else who might need this info, as far as i can figure out, the threads on the model 50 sidewinder barrel are 7/16 20tpi. they apear to be a v cut with no flat areas on the peaks or the valleys.