Yes, you can lock a thumb lock.
Understanding Thumb Locks
Thumb turn cylinder locks provide a simple and convenient way to secure doors. As the name suggests, they feature a thumb turn mechanism on the interior side of the door, allowing you to lock and unlock the door from inside without needing a key. The exterior side typically uses a key for locking and unlocking. The key is primarily for security from the outside, and the thumb turn provides internal convenience.
- Key Feature: The key operates the locking mechanism from the outside.
- Interior Convenience: The thumb turn allows for easy locking and unlocking from the inside. This is a crucial difference from traditional deadbolt locks, where you usually need a key to lock it from either side.
- Mechanism: The thumb turn engages the locking bolt, providing a secure lock.
The provided reference explicitly states: "Thumb turn cylinder locks are a kind of lock that uses a key on the exterior side of the door, and a thumb turn on the interior side. They offer a convenient locking solution, as you can lock them from the inside without the key." This directly confirms the ability to lock a thumb lock from the inside.
