Abstract: A towing head assembly, designed to be mounted on a tow bar of a towing vehicle, which is structured to innerconnect the towing vehicle to a tow pin of the type normally found on aircraft landing gear. A connecting structure includes a rotatable cam selectively positionable into a clamping or locking position defined by camming engagement of a cam structure with the tow pin of the aircraft forcing it to be clamped between a remainder of the mounting structure such as one or more hook members. The cam structure includes an adjusting feature which adjustably forces a portion thereof into camming engagement with the tow pin so as to overcome wear of the tow pin and ensure a firm, clamping engagement therewith.