The Honda 90343-751-800 Self-Lock Nut (5MM) is a genuine OEM fastener designed for GC3000, GC3800, H1011, H2013, H2113, HA4118, and HA4120 riding mowers and lawn tractors. As a direct Honda OEM part, it meets the original assembly specifications for the applications it serves. Confirm your machine's serial number against the fitment table before ordering, as Honda updates parts at serial number breaks and not every serial range uses the same hardware revision.
Key Features
- Genuine Honda OEM Fastener — sourced directly from Honda, so the thread pitch, locking feature, and dimensional tolerances match the original specification exactly
- Self-Locking Design — the integrated locking element resists vibration-induced loosening, keeping assemblies secure through normal operating cycles without relying on thread adhesive
- Broad Riding Mower and Tractor Fitment — listed for GC3000, GC3800, H1011, H2013, H2113, HA4118, and HA4120 Honda riding mowers and lawn tractors; verify your serial number against the fitment table to confirm the correct revision for your unit
A self-lock nut uses a deformed thread section or nylon insert to create resistance against rotation, preventing the fastener from backing out under vibration and cyclical loading. On riding mowers and lawn tractors, where engine vibration and deck movement are constant during operation, this locking action is what keeps assembled components from working loose over time. When a self-lock nut loses its locking torque — typically after repeated removal and reinstallation — it should be replaced with a new unit rather than reused, as the locking element does not return to its original effectiveness once it has been overcome.
Part Details
| Part Number | 90343-751-800 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Self-Lock Nut (5MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Lawn Tractor | HA4118, HA4120 | 1000001-6001209 |
| Lawn Tractor | H2013, H2113 | All |
| Riding Mower | GC3000, GC3800, H1011 | 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.
