
Do Metric threads on A Lathe Specs go by pitch or total length in mm?

I need to thread a muzzle break on an HK Barrel and its 16mm x 1.0 pitch Right Hand.. The lathe my friend has shows it cuts 29 metric threads in the range of 0.2-4.5mm. I know threads by TPI per/inch, but do these metric specs refer to length or Thread Pitch in mm?
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Comments
16mm is the major diameter.
1.0mm is the distance between threads…../\ to /\
I believe that BBean called it…but you might want to test drive the muzzle brake on a scrap piece of threaded stock to prove it.