American mortise locks are the best choice for commercial building doors. The strength of the doors and the locks used will have a major impact on the safety of the building. In order to choose the American mortise lock with suitable requirements, we need to understand the following question: how to choose the functions of American standard mortise lock? Which American mortise lock is suitable to use?

Here are some common American standard function mortise locks:

Function introduction of American standard Mortise Lock

1.       Entrance/Apartment/Dormitory mortise lock--F20

The ANSI mortise lock has deadbolt, latch bolt, auxiliary latch deadlock. The biggest feature of the full-function lock is that the custom function is complete, and the functions of other function mortise lock can basically be realized.

2.       Entry/Office lock—F04

The latch bolt operated by knob/lever from either side unless outside is made inoperative by key outside or by turning inside thumb turn. When outside is locked, latch bolt is retracted by key outside or by knob/ lever inside. Auxiliary latch deadlocks latch bolt when door is closed. Inside knob/lever is always free for immediate egress.

The biggest feature of the office lock is that when no one in the office, the one outside only can open the door with key. When the office owner is in the office, by turning the door knob, the visitor can be controlled to open the door with the key or directly turn the handle to open the door. In this way, when you don’t want to be disturbed in a certain period of time, you can change the door opening method inside the door to use the key to open.