Wacker Neuson 5100064492 Square Key 3/16x3/16

The Wacker Neuson Square Key 3/16x3/16 is a genuine OEM component designed for PT2A series trash pumps. Sourced directly from Wacker Neuson, this part meets the exact specifications of the original hardware installed at the factory. Confirmed fitment covers PT2A series pump models, making it a straightforward like-for-like swap with no guesswork on compatibility.

Key Features

• Genuine OEM Dimensional Accuracy — Cut to the precise 3/16 x 3/16 inch profile required for correct shaft-to-hub engagement, ensuring the key seats fully without play or rocking.
• Drop-In Shaft Replacement — Matches the original keyway geometry on PT2A series pumps for a direct installation into the existing slot with no filing or fitting required.
• PT2A Series Compatibility — Verified fitment for PT2A series trash pumps, covering multiple PT2A model configurations.
• Torque Transmission Integrity — A correctly fitted square key locks the impeller or drive component to the shaft, transferring full rotational torque and preventing slippage under load.
• Wacker Neuson Authorized Part — Supplied as a genuine OEM item, meaning the material grade and hardness match the specification of the key originally installed on the pump.

A square key is a small but critical drivetrain component that sits in a machined slot — called a keyway — cut into both a shaft and the hub of a mating component such as an impeller or pulley. Its job is to lock those two parts together rotationally so that torque from the engine or motor is transferred reliably without slippage. When a square key wears, shears, or goes missing, the driven component will spin freely on the shaft, causing a complete loss of pump output and potential damage to the keyway surfaces themselves — making prompt replacement essential to restoring full pump function.

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.