Multiquip 0457290080 Spring Washer (Volute Casing) M8

The Multiquip 0457290080 is a genuine OEM Spring Washer (Volute Casing) M8 designed for QP2TZ, QP2TK, QP2TH, and QP2TB series pumps. As a direct OEM replacement, this washer matches the original component specification, ensuring correct clamping load and secure fastening at the volute casing joint. Confirmed fitment covers the QP2 pump family, making it a straightforward service part for routine maintenance and casing repairs.

Key Features

• Genuine OEM Spring Tension: — Engineered to deliver the correct deflection and clamp load for M8 fasteners at the volute casing, maintaining a leak-free joint under pump operating pressure.
• Direct Casing Replacement: — Seats and torques to the same specification as the original hardware, allowing straightforward installation without reworking the casing flange or fastener stack.
• Broad QP2 Series Fitment: — Compatible with QP2TZ, QP2TK, QP2TH, and QP2TB pump models, covering both trash pump and centrifugal pump variants in the Quick-Prime line.
• Casing Integrity Under Load: — A correctly functioning spring washer maintains consistent bolt tension through vibration cycles; a fatigued or missing washer allows fastener loosening that leads to volute joint leakage and pressure loss.
• Fuel and Fluid System Safety: — Proper casing sealing at the volute prevents uncontrolled discharge of pumped fluids, keeping the worksite dry and the pump operating at rated output.

A spring washer at the volute casing serves as a locking element that maintains consistent clamping force on the bolts securing the pump's spiral casing. During pump operation, continuous vibration and pressure fluctuation can work standard flat hardware loose over time; the spring washer's elasticity keeps fastener tension steady throughout the service cycle. When this washer wears flat or fractures, bolts lose preload, the volute joint can develop a leak, and pump efficiency drops as internal pressure escapes the casing.

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.