last i recall the stock front grananda maverick rotor has a .554 0r so knurl size... the closest that i have found so far is the the ARP 100-7706
try ARP-100-7714 knurl dia .554", UHL (under head length) 3.435", 1/2-20 thread, part is for Mustang II and spec's from ARP catalog. David
mine measured at .546/.548. I purchased and returned several sizes before finding this size listed for 2005 mustang specs at .549