To Thread or Not to Thread? (existing rifles)

[Mram10us]

with metric threads, are all the same tools used?

Different gear in my lathe to do metric, but like 25wsm said, inserts are the same

 

[25WSM]

Same as mram said. Same 60 degree but does them all. There are some weird threads that use a 55 degree and a thread that has a flat bottom on it. But they are not common.
Shep

 

[hseII]

Same as mram said. Same 60 degree but does them all. There are some weird threads that use a 55 degree and a thread that has a flat bottom on it. But they are not common.
Shep

I have to double check when ordering flash hiders & brakes because the Metric threaded version is so similar.

 

[25WSM]

I meant bit not but. The 1903 Springfield has the weird 10x.051 thread that is flat on the bottom. I really don't know what the designer had in mind when picking that one. I personally like the 16 pitch because it's so mistake free.
Shep