CompX National

CompX National C9100 Mailbox Lock, Clockwise Rotation

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SKU:
39758
MPN:
C9100

Bulk discount rates

Below are the available bulk discount rates for each individual item when you purchase a certain amount

Buy 1 and pay only $18.51 each
Buy 2 - 4 and pay only $17.36 each
Buy 5 or above and pay only $16.20 each
  • CompX National C9100 Mailbox Lock
  • CompX National C9100 Mailbox Lock
  • CompX National C9100 Bottom View
  • CompX National C9100 Side View
  • CompX National C9100 Back View
  • CompX National C9100 Front View
$18.51
Current Stock: 90

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Description

CompX National C9100

Application

C9100 & C9200 are the only mailbox locks approved by USPS for 4C (CBU) mailboxes. USPS specification “USPS-L-1172C” for USPS-STD-4C mailboxes for exterior pedestal-mounted neighborhood boxes. Keyway dust shutter for lock protection. Clip mounted.

Operation

C9100 operates clockwise. Key removable in locked position only.

 

New style USPS postal mailbox lock manufactured by CompX/National.

Lock rotation is 90 degrees clockwise.

Supplied without locking cam - supplied with parts shown. Each lock supplied with 3 working keys.


Some applications will require the CompX National C7120 postal cam. 

Normally, this lock works in applications when the door is hinged on the left. When in the locked position, key removal is vertical at 12:00, key rotates 90 degrees clockwise to unlock position. Key does not remove at unlock position.
 
This item also available in a bulk 25-Pack

 

Key Blank Depends on the key code:

Standard Part no.
D4300 - Codes: 1000-1999, 3000-3999 ( Compatible ESP NA16, Ilco 1646 )

Reverse
Part no.
D4301 - Codes: 2000-2999, 4000-4999 ( Compatible: ESP NA15, Ilco 1646R )

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2 Reviews

  • 5

    Thank you!!

    Posted by Dana on Sep 28th 2026

    We have tried multiple places to get these without the new "ridge" . Please don't stop carrying these!! they work perfectly!!

  • 2

    as pictured

    Posted by Daniel Hunter on Jun 17th 2024

    it fit, but the strike mount hole is bigger than anything i have wish they would have sent a couple options with it

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