The Honda 90303-YG1-003 Hexagon Nut is a genuine OEM Hexagon Nut designed for Honda WT20 and WT30 water pumps. As a direct Honda OEM component, this nut is manufactured to the exact specification used in original production, ensuring a correct fit without modification. Verify your pump's serial number against the fitment table to confirm part number 90303-YG1-003 is the right match for your unit before ordering.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this nut matches the original hardware used on WT20 and WT30 water pumps, so there is no guesswork on fit or thread specification.
- Correct Thread Engagement — an OEM nut delivers the thread form and dimensional tolerances Honda engineered for this application, ensuring proper clamping without the risk of cross-threading or fastener failure.
- Serial Number Verification Recommended — Honda supersedes parts at production breaks, so confirm your pump's serial number against the fitment table to ensure part number 90303-YG1-003 is correct for your specific unit.
A hexagon nut is a standard threaded fastener used to clamp and secure components together on the water pump assembly. When a nut is stripped, corroded, or lost during service, replacing it with the correct OEM hardware ensures the joint is held to the torque and retention Honda intended. Using the wrong fastener — incorrect thread pitch, diameter, or grade — risks under-clamping or damage to mating components, which can lead to loosening under the vibration a running pump generates.
Part Details
| Part Number | 90303-YG1-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Hexagon Nut |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WT20, WT30 | 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.
