The Multiquip 21210 is a genuine OEM Pin 1/8 in Dia x 3/8 in designed for Multiquip diaphragm pump models MQD2HA, MQD3HA, MQD2H, and MQD3H. As a direct OEM replacement, this pin is manufactured to the exact dimensions required for a proper fit within the pump assembly. Sourced directly through authorized Multiquip channels, the 21210 ensures you are installing the correct part the first time. DHS Equipment stocks this pin so you can get your diaphragm pump back in service quickly.
Key Features
- Exact OEM Dimensions — Manufactured to the precise 1/8 in diameter x 3/8 in length specification required by the pump assembly, ensuring correct seating and retention.
- Genuine Multiquip OEM Part — Sourced directly from Multiquip, this pin meets the original design tolerances for diaphragm pump internals — no guesswork on sizing or material grade.
- Direct-Fit Replacement — Installs directly into MQD2HA, MQD3HA, MQD2H, and MQD3H diaphragm pump assemblies without modification.
- Maintains Pump Integrity — A correctly sized retaining pin keeps internal pump components properly aligned and secured, preventing slippage or premature wear of adjacent parts.
- Verified Part Number — Order with confidence using Multiquip part number 21210, cross-referenced to MQD2H and MQD3H series diaphragm pumps.
This small-diameter pin serves as a retention or alignment component within the diaphragm pump assembly, securing internal parts in their correct operating position during pump cycles. When a pin of this type wears, shears, or goes missing, connected components can shift out of alignment, leading to inconsistent pump output or accelerated wear on surrounding parts. Using the correctly dimensioned OEM pin — rather than a substitute — ensures the pump continues to move fluid efficiently and that internal tolerances are maintained across the service life of the unit.
Part Details
| Part Number | 21210 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Pin 1/8 in Dia x 3/8 in |
Compatibility & Fitment
| Name | Model |
|---|---|
| Diaphragm Pumps | MQD2HA |
| Diaphragm Pumps | MQD3HA |
| Diaphragm Pumps | MQD2H |
| Diaphragm Pumps | MQD3H |
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.
