The Honda 90215-SB0-003 Self-Lock Nut (12MM) is a genuine OEM fastener designed for Honda BK4542, BK4546, H2013, H2113, H5013, H5518, HZ54, HZ60, and RT5000 lawn tractors, multi-purpose tractors, and battery-powered zero-turn mowers. As a genuine Honda part, it is built to the exact specification Honda engineers call out for these machines. Confirm your model and serial number against the fitment table before ordering, as Honda updates fastener specifications at production breaks.
Key Features
- Genuine OEM Fastener — sourced directly from Honda, this 12MM self-locking nut matches the thread pitch and locking torque Honda specifies for these applications.
- Self-Locking Design — the prevailing-torque locking feature resists loosening under vibration, maintaining clamp load through normal operating cycles without the need for secondary locking hardware.
- Broad Model Coverage — listed for Honda BK4542, BK4546, H2013, H2113, H5013, H5518, HZ54, HZ60, and RT5000 units; verify your serial number against the fitment table to confirm the correct nut for your machine.
A self-locking nut uses a deformed or nylon-insert locking element that creates friction against the bolt threads, resisting rotation caused by vibration or dynamic loading. On tractors and zero-turn mowers, where operating surfaces are uneven and drivetrain components cycle repeatedly, standard nuts can gradually back off and lose clamping force. A self-locking nut holds its position under those conditions. When a self-locking nut loses its locking torque — typically after repeated removal and reinstallation — it should be replaced rather than reused, as the locking element wears with each application cycle.
Part Details
| Part Number | 90215-SB0-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Self-Lock Nut (12MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Battery-Powered Zero-Turn Mower | HZ54, HZ60 | All |
| Lawn Tractor | BK4542, BK4546, H2013, H2113 | All |
| Multi-Purpose Tractor | H5013, H5518, RT5000 | 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.
