Combined lock and latch

A combined lock and latch for use with an exterior compartment door on a recreational vehicle has a cylindrical barrel and a rotatable plug mounted within an axial opening formed in the barrel. A number of spring-biased, key retractable tumblers extend through the plug and are received in a narrow slot formed in the barrel to prevent the plug from rotating relative to the barrel when the plug is in a locked position. A metal cam having mutually perpendicular legs is mounted at one end of the key plug, with one of the cam legs engaging a fixed keeper when the plug is in the locked position. An arcuate groove is formed on the barrel and receives the tumblers when the key plug is in latched and unlatched positions. The groove sweeps through approximately 90 degrees and allows the plug to be freely rotated without the use of a key. A second leg on the metal cam engages the keeper when the key plug is the latched position.