The Multiquip 1769 Hex Head Bolt 5/8-11 x 4 is a genuine OEM fastener designed for MQD2HA and MQD3HA diaphragm pumps. As a direct OEM replacement, this bolt is manufactured to the exact thread specification and dimensional tolerances required by Multiquip, ensuring proper clamp load and structural integrity at every connection point. Verified compatible with MQD2HA and MQD3HA models, this part ships as an exact match to the original hardware used in factory assembly. Keep a spare on hand to avoid unplanned service delays when replacing worn or damaged fasteners during routine maintenance.
Key Features
- Correct Thread Engagement: — 5/8-11 UNC thread form matches the original tapped receiving holes, delivering full thread engagement without cross-threading risk.
- OEM-Grade Fastener Strength: — Manufactured to Multiquip's original torque and tensile specifications, providing the clamping force needed to hold pump assemblies securely under continuous hydraulic load.
- Drop-In Hardware Replacement: — 4-inch body length and hex head drive match the original bolt configuration, so no re-drilling, re-tapping, or hardware substitution is needed.
- Confirmed Fitment for MQD2HA and MQD3HA: — Sourced and verified for Multiquip MQD2HA and MQD3HA diaphragm pump models specifically.
- Leak Prevention at Pump Joints: — A correctly torqued, properly sized bolt keeps pump housing joints sealed and aligned; an undersized or incorrect fastener can allow joint separation or gasket failure under pressure.
A hex head bolt in a diaphragm pump assembly serves as a primary structural fastener, holding together pump housing sections, manifolds, valve covers, and mounting brackets under the repetitive pressure cycles generated during pumping operation. When this bolt is worn, stretched, or stripped, joint integrity is compromised — leading to misalignment, leaks, or pump housing failure. Using the correct OEM-spec fastener with the right thread pitch, grip length, and material grade is critical to maintaining the sealed, rigid assembly that diaphragm pumps depend on for consistent output and safe operation.
Fits: MQD2HA, MQD3HA | Part Number: 1769 | For fitment questions, contact DHS Equipment.
Part Details
| Part Number | 1769 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hex Head Bolt 5/8-11 x 4 |
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.
