In article ,
-you-should-not-spam says...


2H13 is an old Polish label. Now we use European but they are not
intuitive for me so far. Do you know any site that deals with US.
Alloys nomenclature?

According to this page

http://www.demark.com.pl/zastos_a.htm

2H13 is equivalent to AISI 420 stainless steel.

Oh BTW
how you name this small distance (synonym is paddock) where you must
set your cutter and turn on machine. This distance has smaller
diameter than thread.

Thread relief?

Ned Simmons