I'm putting a link to my post about this in Metrology sub-forum; thought it might get a few more eyes on it here.
https://www.practicalmachinist.com/vb/metrology/1-4-40-uns-class-3-thread-specs-w-tolerances-356002/
Thanks for any help --
https://www.practicalmachinist.com/vb/metrology/1-4-40-uns-class-3-thread-specs-w-tolerances-356002/
Thanks for any help --