COMPX NATIONAL USPS-L-1172C Mailbox Lock C9100 – Lock with 3 Keys

Overview

Meet the COMPX NATIONAL USPS-L-1172C National Mailbox Lock C9100, a compact locking solution designed for USPS compliant mailboxes. The C9100 operates clockwise, offering straightforward access control for outdoor mailbox enclosures during daily deliveries and pickups.

What is included

• Spring clip, mounting nut, and three keys are included.
• Cam and latch are not included.
• Clockwise operation for intuitive use.

Key benefits and practical use

With streamlined hardware, the C9100 supports easy installation and reliable daily use. The included spring clip and nut help secure the unit, while three keys provide flexible access for authorized users. The absence of a cam or latch keeps the profile compact and simple.

Real world scenarios

Ideal for personal mailboxes at single residences, multi-unit buildings, or small offices that follow USPS L 1172C standards. The clockwise mechanism supports consistent operation in common mailbox setups, reducing fumbling during deliveries and pickups.

Why choose this lock

• Meets the USPS L 1172C standard for compatibility with standard mailbox housings.
• Includes essential mounting hardware for faster setup.
• Three keys enable access for trusted users without duplicating keys.

Considerations

Cam and latch are not included, so verify your mailbox hardware before purchasing. A locksmith or building manager can confirm fit for your model.