The Honda 90331-750-881 Flange Nut UNC (3/8-16) is a genuine OEM fastener designed for the HT3810 lawn tractor. As a Honda OEM part, it is manufactured to the exact dimensions and thread specification Honda requires, ensuring a correct, secure installation the first time. If you are servicing an HT3810 and need to replace this hardware, confirming part number 90331-750-881 against your machine's serial number in the fitment table is the best way to verify you have the right variant for your unit.
Key Features
- Genuine OEM Hardware — sourced directly from Honda, so the 3/8-16 UNC thread form and flange diameter match the original fastener exactly.
- Flanged Bearing Surface — the integrated flange distributes clamping load over a wider area than a standard nut, helping maintain consistent holding force without a separate washer.
- Direct HT3810 Fitment — listed for the HT3810 lawn tractor; check your serial number against the fitment table to confirm this is the correct specification for your machine.
A flange nut combines a standard hex nut with a wide, circular base that acts as a built-in washer. The flange spreads the clamping force across a larger surface area, reducing the chance of the fastener pulling through or loosening under vibration — a useful property on a lawn tractor where drivetrain and blade engagement create constant movement. When a fastener like this wears, strips, or goes missing, replacing it with the correct OEM piece ensures the joint it secures holds to the same specification Honda engineered for the HT3810.
Part Details
| Part Number | 90331-750-881 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Flange Nut UNC (3/8-16) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Lawn Tractor | HT3810 | 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.
