Multiquip EM50473 Key Fitting 7X8X45

The Multiquip EM50473 Key Fitting 7X8X45 is a genuine OEM component designed for the QP3TZ trash pump series. As a direct OEM replacement sourced through Multiquip's authorized parts program, EM50473 delivers the exact dimensional spec required for a proper fit in your QP3TZ unit. This key fitting is a small but critical drivetrain component — installing the correct part ensures the impeller or shaft assembly is properly secured and transmits power without slippage or misalignment. Confirm your model number against the QP3TZ fitment before ordering to ensure compatibility.

Key Features

• Genuine OEM Specification: — Manufactured to Multiquip's exact dimensional tolerances for the 7x8x45 key profile, ensuring correct engagement between mating shaft and hub components.
• Direct Drop-In Replacement: — Matches the original key slot geometry on QP3TZ trash pump assemblies, seating flush without modification to the housing or shaft.
• QP3TZ Trash Pump Fitment: — Engineered specifically for the Multiquip QP3TZ series, so you can order with confidence knowing this is the correct part for your machine.
• Power Transfer Integrity: — A correctly fitted key prevents shaft-to-hub slippage, maintaining full torque delivery to the impeller and protecting surrounding components from accelerated wear.
• Compact Critical Component: — Though small in size, a worn or missing key fitting causes immediate loss of pump performance; replacing it promptly restores full operation at minimal cost.

A key fitting — also called a drive key or shaft key — is a small rectangular or tapered piece that locks a rotating component such as an impeller or pulley to a drive shaft. It sits in a machined slot called a keyway, bridging the shaft and the hub so rotational force is transferred evenly between them. When a key fitting shears, wears, or goes missing, the shaft spins independently of the driven component, causing immediate loss of pump output and potential damage to the shaft or hub if the machine is run in that condition.

Part Details

Compatibility & Fitment

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.