Thread Size of 8AN : 3/4-16 UNF. Thread Size of 6AN:9/16"UNF. -6AN Fuel Adapter Fitting to 5/16 GM Quick Connect LS Male BLACK -8AN Fuel Adapter Fitting to 5/16 GM Quick Connect LS Male BLACK. -8AN Fuel Adapter Fitting to 3/8 GM Quick Connect LS Male BLACK.
