The Honda 90109-YB8-003 Bolt-Washer (8X35) is a genuine OEM fastener designed for Honda WT20 and WT30 water pumps. As a factory-original component, this bolt-washer is produced to Honda's exact specifications, ensuring correct thread engagement and clamping characteristics right out of the box. Verify your pump's serial number against the fitment table before ordering to confirm part number 90109-YB8-003 is the correct listing for your unit.
Key Features
- Genuine OEM Honda Fastener — sourced directly from Honda, this bolt-washer meets the exact clamping and thread specifications Honda engineers set for the WT20 and WT30.
- Integrated Washer Design — the combined bolt-and-washer construction delivers consistent load distribution in a single fastener, eliminating the need to source and match a separate washer.
- Direct Replacement — this part installs directly in place of the original, with no modifications needed to the pump assembly.
- Serial Number Verification Recommended — Honda updates parts at serial breaks, so confirm your pump's serial number against the fitment table to ensure this is the correct bolt-washer for your machine.
A bolt-washer is a combined fastener in which the washer flange is formed as part of the bolt head, spreading clamping force evenly across the mating surface without a separate loose washer. On Honda WT20 and WT30 water pumps, correctly torqued fasteners maintain the integrity of assembled components under the vibration and load cycles these pumps generate during operation. A fastener that is the wrong size or specification can strip threads, allow joint movement, or lead to fluid leaks — making the use of the correct OEM part number essential during service and reassembly.
Part Details
| Part Number | 90109-YB8-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Bolt-Washer (8X35) |
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.
