A lock which can be used for doors which are fitted on the right or left. The lock includes a nut which can be adjusted from the outside by an actuating element and which is disposed in a housing. The lock enables a bolt to be displaced between a closed position, when it is pushed out from the housing, and an open position, when it is pushed into the housing, by an adjusting element. According to this invention, the bolt is maintained in a closed position, counter to the pretension of a spring, in order to enable the type of lock, which can be optionally used on the left or on the right, to be produced without any additional costs. The nut can be adjusted from the pushed out bolt or the closed position, optionally, in a clockwise direction or in an counter-clockwise direction, in order to move the bolt into an open position.
