M14x1.5 fits. Same as a range of car wheel studs. In fact FORD GALAXY S-MAX EDGE MUSTANG GT WHEEL STUD M14X1.5 2017- 5274315 is what I found works. You could get someone to cut down and/or turn them to fit?
No never did and it has defied my attempts to measure the tread. It's not UNF not metric fine not BSF either. Can't believe they made their own taps and dies? A machine shop could grind a thread cutting tool and lathe some but would be expensive.