The Honda 90310-V09-A01 Lock Nut (10MM) is a genuine OEM fastener designed for the HA4118 and HA4120 lawn tractors. As a direct Honda OEM component, this lock nut is an exact match to the original hardware used in production, ensuring correct thread engagement and holding force on your machine. Honda supersedes fasteners at serial breaks, so confirm your tractor's serial number against the fitment table before ordering to make sure part number 90310-V09-A01 is the right specification for your unit.
Key Features
- Genuine Honda OEM Hardware — sourced directly from Honda, this lock nut meets the same thread form and dimensional specification as the original fastener installed at the factory
- Locking Retention — the lock nut's integrated locking feature resists loosening under the vibration and load cycles typical of lawn tractor operation, maintaining secure fastener tension over time
- Confirmed Fitment — listed for HA4118 and HA4120 lawn tractors; check your serial number against the fitment table to confirm applicability to your specific unit
A lock nut is a fastener engineered to resist self-loosening under vibration. Unlike a standard hex nut, the locking element — whether a nylon insert, a distorted thread profile, or a prevailing-torque design — creates additional friction that keeps the nut from backing off during operation. On a lawn tractor, fasteners are subjected to constant vibration from the engine and cutting deck, and a lock nut that has loosened or gone missing can allow connected components to shift or detach. Replacing a worn or lost lock nut with the correct OEM specification restores the joint to its designed clamping condition.
Part Details
| Part Number | 90310-V09-A01 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Lock Nut (10MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Lawn Tractor | HA4118, HA4120 | 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.
