The Multiquip 2023400 is a genuine OEM Flat Washer 3/4 SAE designed for MQ Diaphragm Pumps and STOW Diaphragm Pump models including the SDP-2, SDP-3, and CA90749 series. As a direct OEM replacement, this washer meets the exact material and dimensional standards set by Multiquip, ensuring a correct seating and load-bearing fit every time. Sourced directly through authorized distribution, the part is the right call when you need to keep your diaphragm pump hardware tight and properly torqued. Confirm your model against the fitment list — this washer is verified for the MQ Diaphragm Pumps and STOW Diaphragm Pump lines listed above.
Key Features
- SAE-Standard Flat Profile — Manufactured to SAE 3/4 inch dimensional specifications, delivering consistent load distribution across fastener surfaces in diaphragm pump assemblies.
- Genuine OEM Construction — Produced to Multiquip's exact material grade and thickness tolerances, so the washer seats flush and holds clamp load the way the original design intended.
- Direct Hardware Replacement — Drops into the same fastener positions as the original, with no fitting, grinding, or modification needed during reassembly.
- Broad Diaphragm Pump Fitment — Confirmed for MQ Diaphragm Pumps (MQ-D206H), STOW Diaphragm Pumps (SDP-2, SDP-3, CA90749), covering a wide range of Multiquip portfolio pump models.
- Fluid-System Hardware Integrity — A correctly sized and seated washer maintains proper bolt tension in pump housings and covers, helping prevent fluid seepage at critical joint faces.
A flat washer distributes the clamping force of a bolt or nut across a wider surface area, preventing the fastener from pulling through or deforming softer pump housing material during assembly. In diaphragm pump applications, maintaining correct and even bolt tension at cover plates, flanges, and mounting points is essential — uneven loading can cause joint distortion and lead to leaks or premature gasket failure. When a washer is worn, deformed, or missing, fastener preload becomes inconsistent, and fluid integrity at those joints is compromised.
For help confirming this part fits your specific unit, contact the DHS Equipment team with your model and serial number.
Part Details
| Part Number | 2023400 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Flat Washer 3/4 SAE |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQ Diaphragm Pumps | MQ-D206H |
| STOW Diaphragm Pumps | SDP-2 |
| STOW Diaphragm Pumps | SDP-3 |
| STOW Diaphragm Pumps | CA90749 |
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.
