What is a latch bolt?
Keeping this in view, what is the difference between a lock and a latch?
A latch fastens a door, gate or window in position but does not provide security. (See Wikipedia.) A lock prevents anyone without a key from opening a door/gate/etc. A latch keeps something closed but does not lock it.
Likewise, what does a latch go into? The latch is the mechanism that slides into the enge of the door and retracts or protrudes wiht the turn of the door knob. The latch keeps the door closed and when the knob is turned allows the door to open. A lever or lever handle has the same functionality as a door knob, but has a different appearance.
Then, what is a deadlocking latch?
Deadlocking latch bolt (deadlatch) is an elaboration on the latch bolt which includes a guardbolt to prevent “shimming” or “jimmying” of the latch bolt. When the door is closed, the latch bolt and guardbolt are retracted together, and the door closes normally, with the latch bolt entering the strike plate.
How do you fix a stuck latch bolt?
Spray a shot of graphite around the inside edge of the latch bolt hold. Turn the door knob several times back and forth to distribute the lubricant. Wipe off any excess with a rag. Adjust the strike plate up or down as necessary if the latch is simply sticking in the strike plate.