Jul 21, 2026 - 01:13 PM
We’ve provided several answers to questions related to CompX National C9100 USPS-L-1172C Mailbox Lock , see some other helpful Q&A related to this product.
Question: Does the USPS have a master key?
Answer: Yes, the USPS has a master key known as the "arrow key." This key allows postal workers to access mailboxes, collection boxes, and cluster box units for mail delivery and collection.
Question: Is a specification and instruction sheet available for this lock?
Answer: Yes, a specification and instruction sheet can be downloaded. Access to these documents helps with proper installation and maintenance of mailbox locks, making setup easier and reducing errors.
Question: Does this mailbox lock turn clockwise or counter-clockwise?
Answer: This c9100 lock only turns clockwise. The direction of operation is important for matching the lock with the correct mailbox setup and ensuring proper function.
View all CompX National C9100 USPS-L-1172C Mailbox Lock Questions & Answers
