qazii

so I now have a perfect **** with 3/8x16 threads in it and my car has a huge 16mmx1.5 threads in it. Is there an adapter? is there an insert to just mount this **** without using the threads? or am I going to be stuck having to shell out big bucks for the exact **** but with the right threads? (got my 5-speed cue ball **** for 9 bucks as a gamble because I didn't know the thread size in the car yet. Its perfect, but the wrong size) Please point me in the right direction. I would love to find a thread reducer for this as something like that could help me with my boot design.