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CompX National C9100/C9200 Mailbox Lock for USPS-L-1172C

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CompX National C9100/C9200 USPS-L-1172C Mailbox Lock

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Regular Price: $15.90

Sale Price: $11.10

Regular Price: $15.90

Quick Overview

CompX National C9100/C9200 Mailbox Lock for USPS-L-1172C is the only mailbox lock to meet and exceed United States Postal Service specification "USPS-L-1172C." This superior mailbox lock can withstand 1000 pounds of force applied to the cam making it a reliable mailbox security item.                                                          Be sure to select your desired opening rotation type and how many extra key you want. 



  • C9200-When in the locked position, key removal is 12:00, key rotates 90 degrees counterclockwiseto unlock position. Key does not remove at unlock position. Hinges are located on the Right Side.

  • C9100-When in the locked position, key removal is 12:00, key rotates 90 degrees clockwise to unlock position. Key does not remove at unlock position. Hinges are located on the Left Side. 


  • Purchase one of the best mailbox locks available here at Securitybase.com! 

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    Product Description

    CompX National USPS-1172C Summary: CompX National C9100/C9200 Mailbox Lock for USPS-L-1172C is the only mailbox lock to meet and exceed United States Postal Service Specification "USPS-L-1172C" How the lock opens determines the key rotation. Looking at the front of the mailbox, if your hinge is on the right and the lock on the left you need the C9100, opposite for C9200.

    CompX National C9100/C9200 Features:

    • Meets and exceeds United States Postal Service specifications "USPS-L-1172C"
    • Lock can withstand 1000 pounds of force applied to the cam.
    • Accommodates up to 3/16" thick cam.
    • Drain holes on the bottom of the cylinder.
    • Includes: a spring clip, mounting nut and (3) keys.
    • C9100 operates clockwise
    • C9200 operates counter clockwise
    • Will be shipped w/o cam for replacement of locks for new Standard 4C boxes shipped only to USPS
    • 5 Pin tumbler
    • 90° clockwise
    • Dustshutter
    • Spring mounting clip may be reversed for cam clearance.
    • Hex nut is out of round by design to meet strength requirements of USPS L-1172, small socket and immobilization of cam critical for install. Nut will feel cross-threaded, but it s not.
    • Note: key may not remove properly if cam is not attached.

    **Shipped without cam for replacement.**

    Additional Information

    Manufacturer CompX - National
    Model C9100/C9200
    Lock Type Keyed Different
    Dimensions No
    Mounting Clip USPS Mailboxes
    Keys Included 2 Keys
    Weight (lbs.) 0.5000

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