Abstract: The bolt of a door latch or lock is made laterally adjustable to ensure both proper latching operation upon closing the door and also reasonably firm engagement of the catch with the fixed stop to ensure firm holding without vibratory or rattling movement. The adjustment is accomplished by adjusting the angle of emergence of the bolt with respect to the latch structure, e.g., the bolt case. The adjustment capability allows greater tolerance in the mounting of the latch upon the door.