The Multiquip 215700000 is a genuine OEM Woodruff Key #406 1/8" x 3/4" designed for MQD2H, MQD3H, MQD2HA, and MQD3HA diaphragm pumps. As a genuine OEM component, it is manufactured to the exact dimensions and material specifications required by Multiquip, ensuring a correct, secure fit in the keyway. Sourced directly through authorized Multiquip distribution, part 215700000 is the same key supplied in original equipment assembly. Confirm your model code against the fitment list before ordering to ensure this is the correct specification for your pump.
Key Features
- Exact OEM Dimensions — Manufactured to the precise 1/8" x 3/4" (#406) specification, ensuring correct keyway engagement with no slop or shimming required.
- Genuine Multiquip Part — Sourced through authorized Multiquip channels, this is the same component used in original pump assembly — not a substitute profile.
- Direct-Fit Compatibility — Confirmed fitment for MQD2H, MQD3H, MQD2HA, and MQD3HA diaphragm pumps; drops straight into the existing keyway slot.
- Torque Transmission Integrity — A correctly fitted Woodruff key locks shaft and hub in precise rotational alignment, maintaining consistent power transfer to the pump mechanism.
- Drive Safety Consideration — A worn, sheared, or undersized key allows the hub to slip on the shaft, which can cause sudden loss of pump output and potential shaft or hub damage — replacing with the correct OEM key prevents this.
A Woodruff key is a small, semi-circular metal key that fits into a matching slot machined into a shaft and a hub, locking the two components together so they rotate as one unit. In a diaphragm pump, it transmits drive from the engine shaft to the pump's eccentric or drive mechanism, which in turn actuates the diaphragm to move fluid. When a Woodruff key shears or wears down, the hub can spin freely on the shaft, causing an immediate and complete loss of pumping action — making timely replacement with the correct-sized key critical to restoring full pump operation.
Part Details
| Part Number | 215700000 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Woodruff Key #406 1/8" 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.
