1. Introduction
This manual provides essential information for the proper use and care of your Supreme H328 Office Furniture Replacement Key. This key is designed as a direct replacement for locks requiring the H328 key code, commonly found in office furniture such as file cabinets and cubicles.

Figure 1: Supreme H328 Replacement Key. This image displays the front side of the brass key, showing its distinct shape and the embossed manufacturer details on the key head.
2. Key Identification and Setup
The Supreme H328 key is specifically cut for locks with the H328 code. To ensure compatibility, verify the lock code on your furniture. The lock code is typically stamped on the original key or directly on the face of the lock cylinder itself.
Important: Using a key with an incorrect code may damage the lock or the key.
3. Operating Instructions
- Insert the Key: Gently insert the H328 key into the lock cylinder, ensuring the keyway aligns with the key's profile. Do not force the key.
- Turn the Key: Once fully inserted, turn the key clockwise or counter-clockwise, depending on the lock mechanism, to engage or disengage the locking bolt.
- Remove the Key: After the lock has been operated, return the key to its original insertion position (usually vertical) before gently pulling it out.
4. Maintenance
To ensure the longevity and proper function of your H328 key:
- Keep the key clean and free from dirt, dust, or debris.
- Avoid bending or applying excessive force to the key, as this can deform its shape and render it unusable.
- Store the key in a dry place to prevent corrosion.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Key does not insert fully. | Incorrect key code; debris in lock; bent key. | Verify lock code. Check for and remove debris. Inspect key for damage. |
| Key inserts but does not turn. | Incorrect key code; lock mechanism jammed; key not fully inserted. | Verify lock code. Ensure key is fully inserted. If lock is jammed, professional assistance may be required. |
| Key feels loose or wobbly. | Worn lock cylinder; incorrect key cut. | This may indicate a worn lock cylinder. Ensure the key is the correct H328 code. |
6. Specifications
| Attribute | Detail |
|---|---|
| Model | H328 |
| Key Series | Supreme H200-H341 |
| Manufacturer | Supreme |
| Brand (Seller) | EasyKeys |
| Key Type | Illinois Double-Sided Cut Key |
| Compatibility | Office Furniture (File Cabinets, Cubicles) |
| ASIN | B0CTKJZ6BY |
| Item Weight | 0.247 ounces (7 Grams) |
| Date First Available | January 30, 2024 |
7. Warranty and Support
This product is manufactured by Supreme and sold by EasyKeys. For any questions regarding the key's compatibility, function, or if you require assistance, please contact the seller, EasyKeys Inc., directly through your purchase platform. Specific warranty details are not provided in this manual; please refer to the seller's return and support policies at the time of purchase.
For general inquiries, you may visit the EasyKeys Store: EasyKeys Store on Amazon.


