If you can't find a genuine one you can buy a 3d printed replacement
That would be the correct cap, as long as it is in good condition. There is a groove for an O-ring in the cap so be sure that is in place and you should have no problems.
Ok, thanks so much! It’s local and a pretty good price, I think I’ll grab it. Thanks again for the info
If it works fine then and there's no reason to open it then don't. Not worth risking breaking the cap.
Warming may help but the main thing is just steady, even pressure. The O-ring that seals the globe causes the cap to stick in place instead of turnig easily. They quit making those screw on globes in the early 90's so it's been on there for over 35 years. Don't use any tools except maybe something like this
Jason Slocum said: