M7x1 if I am correct. Mind you 200 isn't 350 ! 200Hk is the old style and NOT M7 (Px834). M7 will fit but an original jet will never fit anymore after you have put in a 250cp (M7) size.
Hi thanks wimve i am going to put petromax jet into my hoda as i cannot get jet for this lamp. john Karli thread size = Gewindegröße ? john