The Honda 90104-VJ3-681 Bolt-Washer (8x18.5LH) is a genuine OEM fastener designed for UMC425 and UMC435 trimmers. As a Honda OEM component, this bolt-washer is manufactured to the exact specification of the original part it replaces, ensuring a correct fit without modification. Honda supersedes parts at serial-number breakpoints, so confirm your trimmer's serial number against the fitment table before ordering.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this bolt-washer matches the original fastener specification for UMC425 and UMC435 trimmers.
- Left-Hand Thread (LH) — the LH designation indicates a left-hand thread, a critical detail; installing a standard right-hand fastener in this application will not secure correctly.
- Direct OEM Replacement — replaces the original bolt-washer on a like-for-like basis, with no rework or adaptation required on your trimmer.
- Serial Number Verification Advised — Honda updates fastener specifications at production breaks, so check your machine's serial number against the fitment table to confirm this is the correct version for your unit.
A bolt-washer is a combined fastener that integrates a bolt and a captive washer into a single piece, distributing clamping load evenly across the mating surface while securing the component in place. On UMC425 and UMC435 trimmers, correct fastener specification — including thread direction — is essential to maintaining a secure assembly under the rotational forces the trimmer generates. Using the wrong thread direction or an incorrect size risks inadequate clamping, which can allow the assembly to loosen during operation.
Part Details
| Part Number | 90104-VJ3-681 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Bolt-Washer (8x18.5LH) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Trimmer | UMC425, UMC435 | 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.
