Used on power steering and water pumps on all Volkswagen and Audi water-cooled, four-cylinder, gas or diesel engines, from 1975 & later (Mk3 2.0L non A/C), Volkswagen VR6 1992 and later.
In addition it is used on the power steering pump pulley with Audi V-8 engines, 1990 & later, Audi V-6 engines, 1992 & later, Audi 1981-1995 and Volkswagen 1983-1988 5 cylinder engines that have socket head bolts holding the pulley to the power steering pump.