The Multiquip 0520030310 Key 4.7 X 21 is a genuine OEM component designed for QP2TZ, QP2TB, and QP2TH series pump equipment. As a direct OEM replacement, this key is manufactured to the exact dimensional standard required to maintain proper shaft-to-impeller engagement across compatible pump models. Verified fitment for QP2TZ, QP2TB, and QP2TH means no guesswork when sourcing this critical drivetrain component. Order with confidence knowing you are receiving the same part originally installed at the factory.
Key Features
- Exact OEM Dimensional Specification — Manufactured to the precise 4.7 x 21 mm profile required for correct shaft keyway engagement, ensuring proper torque transfer without play or slippage.
- Direct Shaft Keyway Replacement — Slots directly into the existing keyway on compatible pump shafts with no recutting or modification to the housing or shaft required.
- Confirmed Fitment for QP2 Series Pumps — Verified for use on QP2TZ, QP2TB, and QP2TH pump models, covering both trash pump and centrifugal pump configurations within the QP2 family.
- Maintains Positive Drive Between Shaft and Impeller — A worn or missing key allows the impeller to spin independently of the shaft, causing an immediate and total loss of pump output — this replacement restores full drive integrity.
- Genuine OEM Part — Sourced directly from Multiquip, this is the same key supplied in original equipment builds, not a generic approximation.
A shaft key is a small but load-bearing component that locks the impeller or drive element to the pump shaft, ensuring both rotate together as a single unit. Without a properly seated key, rotational force from the engine cannot be transferred to the impeller, and the pump will fail to move water regardless of engine output. When a key shears or wears beyond tolerance — often due to shock loads, cavitation stress, or improper assembly — the pump loses all pumping function immediately, making fast, accurate replacement essential to restoring operation.
Part Details
| Part Number | 0520030310 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Key 4.7 X 21 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Trash Pumps | QP2TZ |
| Trash Pumps | QP2TB |
| Trash Pumps | QP2TH |
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.
