Painéis de rack 1U perfurados para 16 conectores da série D

Hi there, dear Penn Elcom! I may have a little question because it seems nowhere to be found.. :-( I am looking for the distance between the D-size holes (or center to center actually). I have a project that has mounted XLR's already and it needs front plate but I can't decide between the R1269/1UK/16 or R1269/1UK/12 because of the distance of the D-size holes. I hope you can help me with this...! Kind regards. Christiaan van Silfhout (NL)

Could you tell me what size diameter the punched holes are in this panel? I am on the search for a panel with 17mm to 18mm punched holes.

Are the screw holes threaded? It would be a pain to have to put little nuts on the back of the panel. thanks