Introduction
This manual provides essential information for identifying the correct lock code required to order a replacement key for American Lock M21001-M21822 series padlocks. Accurate identification of your lock code is crucial to ensure the replacement key functions correctly with your existing padlock.
Identifying Your Lock Code
To obtain a functional replacement key, you must first locate the specific lock code associated with your American Lock padlock. This code is unique to your lock and key. Refer to the diagram below for common locations where you can find this code.

Where to Find the Lock Code:
- On the Key: The lock code is often stamped directly onto the key itself. Look for a series of letters and numbers (e.g., FR322).
- On the Lock Face: For some padlocks, the code may be engraved or printed on the visible face of the lock cylinder.
- On a Label Inside/Behind the Lock: In certain installations, the code might be found on a label placed inside the lock mechanism or on the surface directly behind where the lock is mounted.
- On the Cabinet/Door Label: If the padlock is part of a larger system, the code might be on a label affixed to the cabinet or door that the lock secures.
Important Notes:
- Manufacturer Specificity: Lock codes are specific to the manufacturer. Ensure you are ordering a key for an American Lock product. Codes from other brands will not be compatible.
- Key Cut Variations: Even if codes appear similar, the actual key cuts can differ significantly between brands. Always verify the manufacturer.
Ordering a Replacement Key
Once you have accurately identified your American Lock code (e.g., M21381), you can proceed to order your replacement key. Ensure that the key blank type (e.g., AM3) matches the original key for proper function.
When placing an order, provide the exact lock code found. This code will be used to custom cut your replacement key.
Product Specifications
| Manufacturer | American Lock |
| Item Model Number | M21381-americanlock-key-1079343 |
| Product Dimensions | 1.27 x 1.27 x 2.54 cm (0.5 x 0.5 x 1 inch) |
| Item Weight | 113.4 g (4 ounces) |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
Troubleshooting
Cannot Find Lock Code:
If you are unable to locate the lock code using the methods described, it is recommended to contact a professional locksmith or the original manufacturer of the padlock for assistance. They may be able to decode the lock or provide alternative solutions.
Replacement Key Does Not Work:
If your replacement key does not operate the lock, double-check the lock code you provided against all possible locations on your original key or lock. Ensure that the key was ordered for an American Lock product. If the code is confirmed correct, contact the vendor from whom the key was purchased for further support.
Support
For any questions regarding your American Lock replacement key or if you require further assistance, please contact the seller or the American Lock manufacturer directly. Provide your product details and the lock code for efficient support.