Replacement Locks and Keys for 4C Horizontal Mailboxes

Replacement Locks and Keys for 4C Horizontal Mailboxes

Lock problems happen - tenants lose keys, locks wear out, or you need fresh security for new residents. Rather than replacing entire mailbox units, replacement locks solve these issues cost-effectively. The key is using parts specifically made for your system to maintain security and postal compliance.

Master key systems help property managers access units for maintenance, while individual locks keep tenant mail secure. Quality locks typically last 10-15 years with normal use.

Frequently Asked Questions

Match your lock model to the manufacturer’s label on the mailbox or contact customer support with your unit’s serial number for verification.

Property managers use a master key to open all compartments, while each tenant has a unique key for their individual box. This setup ensures security and accessibility.

Replace locks whenever tenants move out or lose keys. Under normal use, quality locks last 10–15 years, but replace sooner if operation becomes stiff or inconsistent.

Yes. Many lock sets include two keys, and spares can be ordered by referencing your mailbox model or lock number for accurate matching.

Yes — all approved replacement parts meet USPS standards for security and compatibility with 4C mailbox systems.

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NBC
Major League Baseball
Harvard University
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Cisco
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U.S. Department of Defense
U.S. Department of State
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Balfour Beatty
Oregon Tech
Syracuse University