The Honda 90312-SB2-000 Self-Lock Nut (8MM) is a genuine OEM fastener designed for Honda HR194, HR195, HR214, HR215, and HR216 lawn mowers. As a direct Honda OEM part, this nut is manufactured to the exact dimensions Honda specifies, ensuring it seats and retains as intended on your mower. If you're restoring a fastener that has loosened, stripped, or gone missing during service, confirming the part number 90312-SB2-000 against your mower's serial number and model designation is the best way to verify you're ordering the right hardware.
Key Features
- Genuine OEM Hardware — sourced directly from Honda, this self-locking nut matches the thread pitch, dimensions, and locking torque Honda engineered for these mowers
- Self-Locking Design — the built-in locking feature resists loosening under vibration, keeping fastened components securely in place through normal mowing use
- Broad HR-Series Fitment — listed for the HR194, HR195, HR214, HR215, and HR216 lawn mowers; verify your model and serial number against the fitment table before ordering
A self-lock nut uses a deformed or nylon-insert locking element that creates friction against the bolt threads, preventing the nut from backing off due to vibration or cyclical movement. On a walk-behind lawn mower like the HR-series, fasteners are subject to constant engine vibration and deck movement, making the self-locking function important for maintaining secure assemblies over time. A worn or incorrect replacement nut that does not hold its locking torque can allow components to work loose during operation.
Part Details
| Part Number | 90312-SB2-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Self-Lock Nut (8MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Lawn Mower | HR216 | 1020781-9999999 |
| Lawn Mower | HR214 | 1175648-9999999 |
| Lawn Mower | HR194 | 1231583-9999999 |
| Lawn Mower | HR195, HR215 | 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.
