my friend wants to get a new teardrop antenna for his 2002 VW GTI .. the stupid e-day guy wants to know the thread size .. my friend tells me that the are the same as the S200 the guy on e-bay wants to know which one it is M6 is 5.85mm or 0.230 inches. and the M5 is 4.85mm or 0.190 inches. .. anyone know thanks