The Honda 90501-YB8-003 Plain Washer (6MM) is a genuine OEM component designed for Honda WT20, WT30, and WT40 water pumps. As a direct Honda OEM part, it is manufactured to the exact dimensions Honda specifies for these pumps, ensuring proper fit and function. Buyers should confirm their unit's serial number against the fitment table, as Honda updates part numbers at specific serial breaks — part number 90501-YB8-003 applies to the serial ranges shown below.
Key Features
- Genuine OEM Dimensions — sourced directly from Honda, this 6MM washer meets the precise sizing Honda requires for correct clamping and load distribution on WT-series water pumps.
- Broad WT-Series Coverage — listed for the WT20, WT30, and WT40 water pumps; confirm your serial number against the fitment table to verify the correct application for your unit.
- Direct OEM Replacement — installs in place of the original without modification, keeping the assembly consistent with Honda's pump design.
A plain washer serves as a load-spreading and bearing surface between a fastener and the component it secures. By distributing clamping force evenly, it prevents the fastener head from pulling through or damaging softer mating surfaces and helps maintain consistent clamp load over time. Using the correct OEM-specified size ensures the fastener assembly performs as Honda intended on these water pumps.
Part Details
| Part Number | 90501-YB8-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Plain Washer (6MM) |
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.
