A latch mechanism for a door of the like includes first and second rotatable latch operating members (20,22) which operate a latching bolt or the like. An axially movable square section spindle (16) extends through complementary holes in both members. In an engaged position, the spindle operates both members when rotated. In a disengaged position, a circular section portion (34) of the spindle registers with a hole in one of the members (22). In the disengaged position the bolt can be operated by the first member (20) even though the second member may be prevented from rotating by means of pins(28). The spindle (16) can be moved between engaged and disengaged positions by a push-rod extending out of the door. Thus, when the second member is locked it may be overridden by actuation of the rod and the first member.