What form is used to document the audit of locks, cylinders, and keys?

The correct choice is AF IMT 2427, Lock and Key Register, because this form is specifically designed to document details related to the audit of locks, cylinders, and keys. The purpose of this form is to maintain a comprehensive record of all locks and keys within a facility, detailing their status, usage, and any changes that may occur regarding their management. Such documentation is essential for effective security oversight and accountability, ensuring that all locks and keys are accounted for and properly managed.

The other options serve different purposes: for instance, the Security Control Record captures broader security-related information, while the Access Control Log tracks individuals' access to specific areas rather than detailing lock and key information. The Key Request Form is primarily used for requesting new keys rather than for auditing existing ones. Therefore, the Lock and Key Register is uniquely tailored for the task of auditing locks, cylinders, and keys, making it the correct choice for this context.