The Multiquip 1042625 Key 7X7X30 is a genuine OEM component designed for the ST6125D and ST4125D submersible pumps. Sourced directly from Multiquip, this drive key delivers the exact dimensions and material hardness required to maintain a positive, slip-free connection between rotating shaft components. Confirmed fitment for ST6125D and ST4125D models makes this a straightforward like-for-like swap during scheduled maintenance or unplanned repairs. Keep a spare on hand — this small part plays an outsized role in keeping your pump running at full capacity.
Key Features
- Genuine OEM Dimensional Accuracy — Cut to the precise 7x7x30 mm profile specified by Multiquip, ensuring correct engagement depth and load distribution across the keyway.
- Positive Shaft-to-Hub Lock — Seats cleanly into the mating keyway without filing or shimming, delivering immediate torque transfer upon installation.
- Verified Fitment for ST6125D and ST4125D — Engineered specifically for Multiquip submersible pump models ST6125D and ST4125D; check your model plate before ordering.
- Resists Torque-Induced Wear — Manufactured from hardened steel to withstand the cyclic loading generated by pump impeller starts and stops, reducing the risk of keyway wallowing over time.
- Direct OEM Replacement — Part 1042625 matches the original specification, so disassembly and reassembly follow standard service procedures without additional tooling.
A drive key is a small rectangular piece of hardened steel that locks a rotating component — such as an impeller or coupling hub — to its shaft by fitting into matching slots (keyways) machined into both parts. When the shaft turns, the key transfers that rotational force directly to the attached component, preventing slippage under load. When a key shears, deforms, or works loose, the impeller loses its drive connection, the pump output drops sharply or stops entirely, and the surrounding keyway surfaces can sustain damage that requires a more costly shaft or housing repair. Replacing a worn or broken key promptly with the correct OEM part protects the integrity of the entire drive assembly.
Part Details
| Part Number | 1042625 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Key 7X7X30 |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQ Submersible Pumps Clean Water | ST6125D |
| MQ Submersible Pumps Clean Water | ST4125D |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
