Multiquip 505390 Expansion Plug

The Multiquip 505390 Expansion Plug is a genuine OEM component designed for Multiquip concrete mixer models including the MC94P/S, MC94SK, MC94PK, MC64SK, MC64PK, and MC64P/S series. As a direct OEM replacement, this plug is manufactured to the same specifications as the original, ensuring a correct fit within the mixer's drum or housing assembly. Sourced directly through authorized Multiquip supply channels, part number 505390 delivers the fit and function your machine requires. Verify your model against the fitment list before ordering to confirm compatibility.

Key Features

• Genuine OEM Construction: — Manufactured to original Multiquip specifications, maintaining the same material grade and dimensional tolerances as the factory-installed plug.
• Direct-Fit Installation: — Engineered to seat correctly in the original bore without machining or adjustment, making replacement straightforward in the field or shop.
• Broad Mixer Compatibility: — Fits MC94P/S, MC94SK, MC94PK, MC64SK, MC64PK, and MC64P/S Multiquip concrete mixer models.
• Sealing Integrity: — Maintains a secure, leak-free seal within the mixer assembly, protecting internal components from contamination and fluid loss during operation.
• Verified OEM Part Number: — Cross-reference part number 505390 against your mixer's parts manual to confirm an exact match before installation.

An expansion plug is a press-fit or threaded closure used to seal machined passages, ports, or openings in a housing or drum assembly. On concrete mixers, these plugs seal off oil galleries, coolant passages, or structural bores that must remain closed during operation. A failed or missing expansion plug can allow fluid leakage or allow debris to enter internal passages, leading to accelerated wear or mechanical damage to surrounding components. Replacing a worn or displaced plug promptly keeps the mixer's internal systems properly sealed and functioning as intended.

For fitment questions or ordering assistance, contact the DHS Equipment team directly.

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.