The Honda 90302-YB9-003 Nut Washer (10MM) is a genuine OEM Nut Washer (10MM) designed for Honda WT20, WT30, and WT40 water pumps. As a direct Honda OEM component, this washer is manufactured to the exact dimensions and specifications Honda requires for these pumps. Confirm the part number 90302-YB9-003 against your pump's serial number in the fitment table to ensure this is the correct listing for your unit before ordering.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this washer meets the dimensional requirements Honda specifies for the WT-series pump application
- Exact 10MM Sizing — the (10MM) designation identifies the specific size variant; verify it matches your pump's requirement before purchasing
- WT-Series Fitment — listed for the WT20, WT30, and WT40 water pumps, covering Honda's centrifugal pump range; check your serial number against the fitment table to confirm the correct application
A nut washer serves as a fastening component that distributes the clamping load of a threaded nut across the surface beneath it, helping to maintain consistent fastener tension and protecting the mating surface from damage. On Honda WT-series centrifugal water pumps — which operate under continuous vibration and mechanical load during pumping — secure fastening is essential to keeping assembled components correctly positioned. When a washer wears, deforms, or goes missing, fastener tension becomes uneven, which can allow hardware to loosen over time and lead to mechanical movement or leaks at the affected joint.
Part Details
| Part Number | 90302-YB9-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Nut Washer (10MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WT20, WT30, WT40 | All |
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.
