1. Product Overview
The Architectural Mailboxes #5141 Key Blank for Mailbox Lock with Indicator is designed for creating additional key duplicates. This product is essential for users who require spare keys for their mailbox lock. It is constructed from durable brass, ensuring longevity and reliable performance.
Key features include:
- Comes in a convenient 4-pack of key blanks.
- Specifically designed for mailbox locks with an indicator.
- Requires an existing cut key for duplication.
- Made of high-quality brass for durability.

Image 1: Four Architectural Mailboxes 5141 key blanks, packaged as two pairs on separate key rings. These blanks are designed for duplication by a locksmith.

Image 2: A detailed view of a single Architectural Mailboxes 5141 key blank, showing its unique shape and design, which is specific to certain mailbox locks.
2. Setup and Key Duplication
The Architectural Mailboxes 5141 Key Blank is not compatible with automated key duplicating machines. To create a working duplicate key, you must take the key blank and your existing, original cut key to a professional locksmith.
Identifying the Correct Key Blank
Before visiting a locksmith, ensure you have the correct key blank for your mailbox lock. The 5141 key blank is specifically for locks that have short red and green indicators. Refer to the identification guide below to confirm your lock type.

Image 3: This visual guide assists in identifying the correct key blank for your mailbox lock. The 5141 key blank is highlighted for locks featuring short red and green indicators. Other key types (5143, Y11, 5140) are also shown for comparison.
Duplication Process:
- Gather Materials: Ensure you have your Architectural Mailboxes 5141 Key Blank(s) and the original, working key for your mailbox lock.
- Locate a Locksmith: Find a reputable locksmith service in your area.
- Professional Duplication: Present both the key blank and your original key to the locksmith. They will use specialized equipment to cut the blank to match your original key's pattern.
- Test the Key: After duplication, always test the new key in your mailbox lock to ensure it functions correctly before relying on it.
3. Operating Instructions
Once your 5141 key blank has been professionally cut and verified, its operation is straightforward:
- Insert Key: Gently insert the newly cut key into the mailbox lock's keyway.
- Turn to Unlock/Lock: Turn the key clockwise or counter-clockwise as required to engage or disengage the lock mechanism.
- Remove Key: Once the lock is in the desired state (locked or unlocked), turn the key back to its original insertion position and remove it.
Ensure the key is fully inserted before attempting to turn it to prevent damage to the key or the lock.
4. Maintenance
To ensure the longevity and proper function of your duplicated 5141 key, follow these simple maintenance guidelines:
- Keep Clean: Periodically wipe the key with a soft, dry cloth to remove any dirt or debris that may accumulate.
- Avoid Bending: Do not apply excessive force or attempt to bend the key, as this can deform its shape and render it unusable.
- Proper Storage: Store spare keys in a dry, safe place to prevent corrosion or loss.
- Lubrication (Lock): If the mailbox lock becomes stiff, a small amount of graphite lubricant (not oil-based lubricants) can be applied to the lock mechanism, not the key itself.
The key blanks are constructed of brass, which is naturally resistant to corrosion, but proper care will extend their lifespan.
5. Troubleshooting
If you encounter issues with your duplicated 5141 key, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Key does not insert fully into the lock. | Incorrect key blank used, or burrs/imperfections from cutting. | Verify you used the correct 5141 key blank. Return to the locksmith to check for cutting errors or burrs. |
| Key inserts but does not turn the lock. | Key not cut accurately, or internal lock mechanism issue. | Consult the locksmith who cut the key for re-evaluation. If the original key works, the issue is with the duplicate. If neither works, the lock may be faulty. |
| Key feels stiff or difficult to turn. | Lack of lubrication in the lock, or minor key imperfections. | Apply a small amount of graphite lubricant to the lock mechanism. Avoid forcing the key. |
For persistent issues, it is recommended to consult a professional locksmith or the manufacturer of your mailbox lock.
6. Specifications
| Attribute | Detail |
|---|---|
| Brand | ARCHITECTURAL MAILBOXES |
| Model Name | 5141 Key Blank |
| Model Number | 5141 |
| Material | Brass |
| Item Dimensions (L x W x H) | 0.15 x 0.75 x 2.5 inches |
| Item Weight | 1.13 ounces |
| Number of Pieces | 4 (per pack) |
| Lock Type Compatibility | Key Lock with Indicator |
| UPC | 832794004236 |
7. Warranty and Support
For specific warranty information regarding the Architectural Mailboxes 5141 Key Blank, please refer to the official Architectural Mailboxes website or contact their customer support directly. Warranty terms typically cover manufacturing defects.
Customer Support:
- Visit the official ARCHITECTURAL MAILBOXES Store on Amazon for product information and contact details.
- For issues related to key cutting, please contact the professional locksmith who performed the duplication.





