The Multiquip 174500200 is a genuine OEM Flange Screw 5/16-18 x 3/4 designed for MQD2H, MQD3H, MQD2HA, and MQD3HA diaphragm pumps. Sourced directly from Multiquip, this fastener meets the exact thread pitch, diameter, and length specifications required by the factory. Correct fastener spec matters on diaphragm pumps — an incorrect screw can compromise flange seating and lead to leaks or premature seal failure. Confirm your model code against the fitment list to ensure this is the right part before ordering.
Key Features
- Genuine OEM Thread Specification — 5/16-18 x 3/4 thread form matches the original fastener exactly, ensuring proper torque load and flange engagement on pump assemblies.
- Direct Bolt-In Replacement — Installs in the same position as the original without rethreading or modification to mating flanges or housing components.
- Confirmed Fitment for MQD Series Diaphragm Pumps — Compatible with MQD2H, MQD3H, MQD2HA, and MQD3HA models, covering both standard and high-performance diaphragm pump configurations.
- Flange Integrity Protection — A correctly spec'd flange screw maintains even clamping pressure across pump flanges, preventing fluid bypass and protecting diaphragm and seal life.
- Genuine Multiquip OEM Part — Part number 174500200 is the factory-authorized replacement, so you know you are installing the correct fastener the first time.
A flange screw on a diaphragm pump is responsible for securing pump housing flanges, covers, or porting plates together under operating pressure. When these fasteners are correctly torqued and properly spec'd, they create a uniform clamping load that keeps internal seals and diaphragms seated and prevents fluid from bypassing the pump chamber. A worn, stripped, or incorrect-size flange screw can allow the joint to shift under pressure, leading to leaks, diaphragm damage, or loss of prime — any of which will take the pump out of service until the fastener is replaced with the correct part.
Part Details
| Part Number | 174500200 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Flange Screw 5/16-18 x 3/4 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Diaphragm Pumps | MQD2H |
| Diaphragm Pumps | MQD3H |
| Diaphragm Pumps | MQD2HA |
| Diaphragm Pumps | MQD3HA |
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.
