Multiquip 05100 Key 1/4"x1/4"x43

The Multiquip 05100 Key 1/4"x1/4"x43 is a genuine OEM component designed for QPT305SLT, QP305SLT, QPT205SLT, and QP205SLT centrifugal pumps, as well as QP2TZ and QP3TZ trash pumps. As a direct OEM replacement, this key is manufactured to the exact dimensions required to maintain proper shaft-to-impeller engagement across the compatible pump families. Sourced directly through Multiquip's authorized parts network, the 05100 ensures you are installing the correct part the first time. Confirm your model code against the fitment list before ordering to ensure accurate compatibility.

Key Features

• Exact OEM Dimensions — Manufactured to the precise 1/4"x1/4"x43 specification, ensuring correct torque transfer between the shaft and driven component without slippage or play.
• Genuine Multiquip Part — Sourced directly from Multiquip's authorized OEM supply chain, this key meets the same material hardness and dimensional tolerances as the original factory component.
• Broad Pump Compatibility — Fits QPT305SLT, QP305SLT, QPT205SLT, and QP205SLT centrifugal pumps, plus QP2TZ and QP3TZ trash pumps, covering multiple models from a single part number.
• Protects Shaft and Hub — A correctly fitted key prevents relative rotation between mating components, protecting both the shaft and impeller hub from wear damage that a loose or undersized key would cause.
• Drop-In Replacement — Matches the keyway geometry of the original installation, allowing straightforward swap-out during routine pump service or impeller replacement.

A woodruff or parallel key like the Multiquip 05100 serves as the mechanical link between a rotating shaft and the component mounted on it — in this case, the pump impeller. It sits in matched keyways cut into both the shaft and the hub, locking them together so that torque from the engine is transferred directly to the impeller without slippage. When a key shears, wears, or goes missing, the impeller can spin independently of the shaft, causing the pump to lose prime and output entirely. Replacing a damaged or missing key promptly restores full power transfer and prevents progressive damage to the shaft and hub keyways.

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.