In reply to DEAN A BAKER.

Rolex uses its own thread-locking compound at the factory, but when adjusting your bracelet at home, it is generally recommended to use a low-strength thread locking compound (such as Loctite) to ensure that the screw pins do not unscrew themselves during wear and use. As the bracelet flexes and the link moves against the pin, the rotational force can sometimes slightly unscrew it, so a low-strength thread locking compound will help prevent this from happening.