The Multiquip 176603600 Hex Heavy Nut 7/16" is a genuine OEM fastener designed for MQD2HA and MQD3HA diaphragm pumps. As a direct OEM replacement, this heavy hex nut is manufactured to the same specifications as the original hardware installed at the factory, ensuring correct torque retention and secure clamping across critical pump connections. Sourced directly through authorized Multiquip distribution, 176603600 is the correct part to specify when servicing MQD2HA and MQD3HA units. Keep one on hand to avoid delays when performing routine maintenance or field repairs.
Key Features
- Heavy-Series Hex Profile: — The thick, heavy-duty hex wall construction delivers higher torque capacity than standard nuts, maintaining clamping force under vibration-intensive pump operation.
- Genuine OEM Hardware: — Manufactured to Multiquip's original material and dimensional specification, so thread engagement, seating, and load distribution match the intended design exactly.
- Direct Drop-In Replacement: — Threaded 7/16" specification matches the existing fastener position on MQD2HA and MQD3HA assemblies — no rethreading, chasing, or adapter required.
- Verified Fitment: — Confirmed for Multiquip MQD2HA and MQD3HA diaphragm pumps; using the correct OEM part number eliminates the risk of mismatched hardware causing joint failure.
- Pump Integrity Depends on It: — A worn, stripped, or incorrect nut on a diaphragm pump can lead to fluid leaks, loose valve assemblies, or uncontrolled discharge — replacing with the correct OEM fastener restores the sealed, secure connection the pump requires.
A hex heavy nut is a thick-profile, six-sided fastener designed to carry higher clamping loads than standard hex nuts of the same thread size. On diaphragm pumps like the MQD2HA and MQD3HA, fasteners work against continuous vibration and fluid pressure cycling — conditions that can accelerate wear, loosening, or thread damage on undersized hardware. Using the correct heavy-series nut ensures joint integrity is maintained through repeated pump cycles, preventing leaks and keeping valve and housing connections tight over the service life of the equipment.
For fitment questions or to confirm this part for your specific unit, contact the DHS Equipment team before ordering.
Part Details
| Part Number | 176603600 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hex Heavy Nut 7/16" |
Compatibility & Fitment
| Name | Model |
|---|---|
| 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.
