I am replacing a Brake Booster on my J10.
Getting the old nuts off was not fun, both the nuts from the under the dash from the firewall adapter and from booster studs to the adapter.
Now, I am about to install the new dual diaphragm brake booster and the new unit comes with no fasteners.
My old flange nuts are messed up from me fighting to get it off.
The booster studs will not accept a standard hex nut, course or fine thread and a metric nut will not fit.
What size are these hex nuts and where can I purchase four?