FILTER HEAD ASSEMBLY HAVING A THREADED BAYONET CONNECTOR ADAPTER WITH A POSITION TOLERANCE IMPROVING RETAINER RING

A filter head assembly includes a filter head and a threaded bayonet connection adapter having a rotational position tolerance improving retainer ring. The rotational position tolerance improving retainer ring providing for and enabling further deformation of the rotational position tolerance improving retainer ring beyond the predetermined final assembly torque to achieve the required final rotational position of the threaded bayonet connection adapter for the correct operation of the open and locked position indicators on the filter head.