The Multiquip EM709 Square Head Set Screw 3/8-16X3/4 ST30, 60, 80 LST25 is a genuine OEM fastener designed for ST30 series concrete pumps and compatible swing-tube pump models. As a direct Multiquip OEM component, EM709 is manufactured to the exact thread pitch, drive geometry, and material grade specified for these machines. Sourcing the correct set screw matters — an improperly sized or graded fastener can back out under vibration or fail to hold critical assemblies in position. DHS Equipment stocks this part to keep your concrete pump running at full capacity.
Key Features
- OEM Thread Specification: — Cut to 3/8-16 thread pitch with the correct torque rating for concrete pump assembly loads, not a generic hardware substitute.
- Square Head Drive Geometry: — The square head profile provides high wrench contact area, allowing proper torque application in tight pump housing locations where hex fasteners strip easily.
- Confirmed ST30 Fitment: — Engineered specifically for the ST30 swing-tube concrete pump; also cross-references to ST60, ST80, and LST25 models within the Multiquip pump lineup.
- Correct Material Grade: — Manufactured to the hardness and tensile strength required to maintain clamp load under the continuous vibration and hydraulic forces generated during concrete pumping operations.
- Direct OEM Replacement: — Installs into the existing threaded bore with no chasing or rework required, restoring the assembly to its original engineered clamping condition.
A set screw is a headless or square-head fastener used to lock a component — such as a collar, hub, or housing panel — firmly against a shaft or mating surface. In concrete pump applications, set screws secure key assemblies that must remain positionally fixed despite constant vibration and pressure cycling. When a set screw loosens, backs out, or fails, the components it retains can shift, causing misalignment, accelerated wear, or a full mechanical failure that takes the pump out of service. Using the correct OEM-specified part like the Multiquip EM709 ensures the fastener holds to spec throughout the pump's service interval.
For questions about fitment or to confirm this is the right part for your machine, contact the DHS Equipment parts team before ordering.
Part Details
| Part Number | EM709 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Square Head Set Screw 3/8-16X3/4 ST30, 60, 80 LST25 |
Compatibility & Fitment
| Name | Model |
|---|---|
| ST30 | ST30 |
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.
