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CompX National Pin Tumbler Mailbox Lock
Sku: C9100 / C9200
Select Mailbox Locks:
Pin Tumbler Mailbox Lock - Clockwise Operation Details
Pin Tumbler Mailbox Lock - Clockwise Operation. NOTE: Extra keys may only be purchased with the purchase of a new lock.
Price: $22.27
40 in Stock. More on the way! Arriving by 06/05/2026.
Bulk Pricing
2 units
$20.27 ea
5 units
$18.27 ea
10 units
$16.27 ea
SKU: C9100
Free shipping not eligible
Shipping charges will apply to this item.
Extra Keys $7.17 each
To add extra keys, C9100 must be in the cart.
SKU: C9100 / C9200
Product Description
The CompX National C9100 / C9200 Mailbox Lock is a dependable replacement for worn or damaged National-brand mailbox locks. Designed as a direct replacement, this durable cam lock is commonly used in residential and centralized mailboxes.
This lock matches the USPS L-1172C form factor, making it a suitable replacement option for mailboxes originally equipped with USPS-style locks. Ideal for restoring secure mail access, the CompX C9100/C9200 mailbox lock offers smooth operation and long-lasting performance.
Please compare your existing lock’s dimensions, cam style, and rotation to ensure proper fit.
C9100 Instruction Sheet
C9200 Instruction Sheet
This lock matches the USPS L-1172C form factor, making it a suitable replacement option for mailboxes originally equipped with USPS-style locks. Ideal for restoring secure mail access, the CompX C9100/C9200 mailbox lock offers smooth operation and long-lasting performance.
Please compare your existing lock’s dimensions, cam style, and rotation to ensure proper fit.
- APPLICATION – Replaces USPS-L-1172C locks. Exterior pedestal-mounted neighborhood boxes. Has keyway dust shutter for lock protection. Clip mounted. C9100 & C9200 are the only mailbox locks approved by USPS for 4C (CBU) mailboxes.
- OPERATION – C9100 operates clockwise to unlock. C9200 operates counter clockwise to unlock. Key removable in locked position only.
- KEYING – Available keyed differently only (2,000 changes).
- PACKAGING – Includes: a spring clip, mounting nut and (3) keys.
Looking for Keys to Your Mailbox?
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2000PS - 2999PS
3000PS - 3999PS
4000PS - 4999PS
C9100 Instruction Sheet
C9200 Instruction Sheet
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Bulk Pricing
2 units
$12.07 ea
5 units
$11.07 ea
10 units
$10.07 ea
20
in stock
$13.07
Free shipping not eligible
Shipping charges will apply to this item.
CompX National
C9100-C9200-EXTRA-KEY
Extra Cut Keys for C9100 & C9200 Mailbox Lock Packages - CompX National D4301 Key Blank
Duplicate Keys for C9100 & C9200 Mailbox Lock Packages.
858
in stock
$7.17
Free shipping eligible
Ships free when your cart contains only free-shipping items and totals $35+.
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