* The Latch Bolt: This is the main metal piece that extends from the door frame and engages with the strike plate on the door itself. It's usually spring-loaded, so it retracts when the door is opened.
* The Strike Plate: A metal plate mounted on the sliding door which receives the latch bolt when the door is closed.
* The Handle and Linkage: The inside and outside door handles operate a linkage system. Pulling the handle activates this linkage, which either retracts the latch bolt (allowing the door to open) or forces the latch bolt into the strike plate (closing and securing the door). This linkage might include rods, cables, and levers.
* The Roller Assembly (and Track): While not directly part of the latching *mechanism*, the rollers and track are crucial. If the rollers are worn or the track is damaged, the door won't close properly, preventing the latch bolt from engaging fully with the strike plate. A slightly misaligned door can also prevent the latch from working.
* Possibly a Catch or Secondary Latch: Some B200 vans (depending on trim level and condition) might have a secondary latch or a small catch that adds extra security, but the primary closure is still the main latch bolt.
In short, the door stays closed because the latch bolt is firmly engaged with the strike plate, held in place by the spring and/or the force of the closing mechanism. Proper functioning requires all parts to be aligned, in good condition and free of wear or damage.
