This nitrogen valve typically has a small standing 3mm hex visible on top just proud of the center carbide jet pin. It needs cleaned from time to time but today it has froze up and won't come out.....to the point a process tech actually ruined the head and the micro socket can no longer get a bite.



Since we have a carbide center there is no drilling this out so I had a TiG trick to try before I would be forced into an EDM

40 amps and Brutis rod stacked up tall then weld out left and right into mid-air to for a "T" handle



Add a spritz of PB blaster and back it out.....pretty deep

that's pretty clever -- i've made an L handle and used that as my filler rod, then left if there to cool .. but the T is asweome

I cheat on those Ted. I just drive in the next size up torx head with a hammer and turn em out. Necessity is the mother of invention.

The nitrogen pin had a male hex not a female hex.....so you won't be driving anything into it

3mm male hex (nut).....when nice and un-phucked turns with a micro socket nicely

Stripped into a 3mm round shank with a 1.5mm carbide center pin creates a problem

I will note.....the center pin was unharmed by the weld and was re-used

AAHhhhhh gotcha. I guess you're probably lucky that you had a stub to weld to at all. The first thing that heavy handed millwrights feel they have to do is get a vise grip on everything. A .116 inch pin generally doesn't hang around long under that sort of temperament. LOL