The Multiquip 0451250120 Lock Washer M12 is a genuine OEM fastening component designed for QP402H, QP402B, MQ62TDD, QP4TK, and QP4TZ series pump equipment. As a direct Multiquip OEM part, it meets the original design tolerances and material specifications required for these pump applications. This washer is a precise match for centrifugal pump models QP402H and QP402B, as well as trash pump models MQ62TDD, QP4TK, and QP4TZ, making it straightforward to source the correct hardware when servicing these machines. DHS Equipment stocks this part to help you get your equipment back in service without second-guessing compatibility.
Key Features
- Genuine OEM Grade Hardness — Manufactured to the original material specification, ensuring the washer delivers consistent clamping force without deforming under torque.
- M12 Thread Match — Sized specifically for M12 fasteners used in the pump assembly, dropping directly onto the bolt without modification.
- Broad Pump Compatibility — Confirmed fit for centrifugal pump models QP402H and QP402B, and trash pump models MQ62TDD, QP4TK, and QP4TZ.
- Vibration Resistance — The lock washer's design resists loosening caused by pump vibration and cyclic loading during operation, helping maintain joint integrity over time.
- Correct Torque Transfer — Proper seating between the fastener and mating surface ensures bolt preload is maintained, critical in pump housings subject to pressure and continuous motion.
A lock washer is a thin hardened ring placed under a bolt or nut to prevent the fastener from backing out due to vibration, torque, or thermal cycling. In pump applications, where engines and impellers generate constant vibration, even a small amount of fastener loosening can lead to misalignment, leaks, or component damage. Replacing a worn, flattened, or corroded lock washer with the correct OEM part — such as the Multiquip 0451250120 — restores the clamping integrity of the joint and keeps critical pump assemblies securely fastened during operation.
Part Details
| Part Number | 0451250120 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Lock Washer M12 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Centrifugal Pumps | QP402H |
| Centrifugal Pumps | QP402B |
| Trash Pumps | MQ62TDD |
| Trash Pumps | QP4TK |
| Trash Pumps | QP4TZ |
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.
