The Multiquip EM50451 Plug 3/4" Hex is a genuine OEM component designed for the ST80 concrete pump. Sourced directly from Multiquip, this plug is manufactured to the exact specifications required for proper sealing and fit on ST80 series equipment. If you're servicing or rebuilding an ST80 and need a correctly sized hex plug, EM50451 is the confirmed OEM part for the job.
Key Features
- OEM-Grade Sealing Material — Manufactured to the precise thread form and material specification needed to hold pressure and prevent leaks in concrete pump fluid circuits.
- Direct Hex-Drive Installation — The 3/4" hex profile allows installation with a standard wrench, threading directly into the intended port without adapters or modifications.
- Confirmed ST80 Fitment — Validated for use on the Multiquip ST80 concrete pump; verify EM50451 against your parts manual before ordering.
- Genuine OEM Sourcing — Supplied as an authentic Multiquip part, ensuring the thread pitch, hex size, and material grade match the original component exactly.
- Prevents Fluid Loss and Contamination — A properly seated hex plug maintains system integrity; a missing or damaged plug can allow hydraulic fluid or concrete slurry to escape, creating both a mess and a safety concern.
A hex plug is a threaded fastener used to seal an unused port or access point in a hydraulic or fluid system. On the ST80 concrete pump, plugs like the EM50451 close off ports in the pump body, valve blocks, or manifolds to keep the hydraulic circuit pressurized and free from contamination. When a plug is missing, cross-threaded, or cracked, the system can lose fluid pressure, allow contaminants in, or develop leaks that compromise pump performance and create a hazardous work area.
Need help confirming this is the right part for your machine? Contact the DHS Equipment parts team — we're here to make sure you get the correct component the first time.
Part Details
| Part Number | EM50451 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Plug 3/4" Hex |
Compatibility & Fitment
| Name | Model |
|---|---|
| ST80 | ST80 |
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.
