I'm looking to buy a set of Gorilla locking lugnuts for my 96 Fleetwood. I know the thread is m12x 1.50. My question is what degree the concical seat is for a factory type wheel? 45* or 60*? I currently have Corvette wheels with adaptors and have used OE type lugnuts for the adaptor mount and the wheel mount without any issues. I can't find what degree the factory style lugnuts are. Thanks.