Compx National C9100 USPS-L-1172C Mailbox Lock 2025 (Clockwise) - 10 Pack

Overview

Introducing the new style C9100 mailbox lock from Compx/National. Built for reliable daily use, this lock is designed to rotate 90 degrees clockwise, delivering a predictable, easy to operate motion that supports smooth mail access while helping keep the compartment secure.

What’s included and how it is used

• New style C9100 USPS mailbox lock manufactured by Compx/National for durability.
• 90-degree clockwise rotation provides a consistent, intuitive operation.
• Supplied without a locking cam; parts shown are included to fit your setup.
• Each lock ships with 3 working keys for immediate use across multiple mailboxes.
• Three-key bundle is ideal for replacements or multi-unit installations.

Compatibility and options: the lock is a component for USPS-L-1172C mailboxes. A special formed hook cam is sold separately to match your model, allowing you to pair the lock with the correct cam for proper engagement.

Real world benefits and setup ideas

• Batch readiness for property managers or small communities renewing several boxes at once.
• Solid metal construction with a crisp turning action that supports everyday use with confidence.
• Three keys per lock simplify key distribution to trusted residents or staff.
• Compact profile aligns with standard mailbox housings for straightforward installation.

In daily use, the combination of a clean clockwise rotation, a tri-key kit, and a replaceable cam option can make mailbox maintenance less disruptive. While results may vary by installation, this setup offers a practical path toward replacing worn hardware and maintaining access control on a busy mailbox row.

Quality and durability: manufactured by a reputable brand, the lock is designed for outdoor use typical of mailbox fittings. The mechanism offers a smooth, tactile feel when turning the key, and the included keys feel solid and reliable in hand.