The Multiquip 173800100 Socket Set Screw 5/16-18 x 1/2 is a genuine OEM fastener designed for MQD2H and MQD3H diaphragm pump models. As a factory-sourced component, 173800100 delivers the correct thread specification and dimensional profile to seat and hold exactly as the original design requires. Verified fitment covers Multiquip diaphragm pump equipment, making this the right call when restoring or servicing your pump to original condition.
Key Features
- Genuine OEM Thread Integrity — Manufactured to the exact 5/16-18 thread form and 1/2-inch length specification, ensuring full thread engagement without risk of stripping or misalignment.
- Direct Socket-Drive Installation — Hex socket head accepts standard hex keys for clean, torque-controlled tightening in tight pump housing spaces.
- Confirmed Diaphragm Pump Fitment — Verified for MQD2H and MQD3H Multiquip diaphragm pump models; cross-reference part number 173800100 before ordering.
- Secure Clamping Under Vibration — A properly torqued set screw maintains component position through the continuous vibration and pressure cycles typical of diaphragm pump operation; a loose or incorrect screw can allow critical components to shift and cause pump failure.
- Fuel and Fluid System Integrity — Used in pump assemblies where fastener failure can result in leaks or loss of prime; using the correct OEM specification screw is essential for safe, leak-free operation.
A socket set screw is a headless fastener that bears down on a shaft, collar, or housing component to lock it firmly in position. In diaphragm pump assemblies, set screws are commonly used to secure drive components and keep them aligned under the repetitive loading of each pump stroke. When a set screw loosens, backs out, or is replaced with an incorrect size, the component it secures can shift, causing premature wear, loss of pump output, or internal damage. Using the correct OEM specification screw — the right thread pitch, length, and material — ensures the fastener holds its clamp load through demanding pump cycles.
For fitment questions or help confirming that 173800100 is the right part for your Multiquip diaphragm pump, contact the DHS Equipment parts team directly.
Part Details
| Part Number | 173800100 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Socket Set Screw 5/16-18 x 1/2 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Diaphragm Pumps | MQD2H |
| Diaphragm Pumps | MQD3H |
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.
