The Honda 90543-750-881 Lock Washer (5/16) is a genuine OEM replacement designed for GC3000 and GC3800 riding mowers and the HT3810 lawn tractor. As a direct Honda OEM part, it is manufactured to the same specification as the original hardware installed on these machines. Confirm your model and serial number against the fitment table before ordering — Honda supersedes hardware at production breaks, and verifying part number 90543-750-881 against your machine ensures you receive the correct washer for your unit.
Key Features
- Genuine Honda OEM Hardware — sourced directly from Honda's parts catalogue, ensuring the correct size, thickness, and bite geometry for the 5/16-inch fastener applications on these machines
- Direct-Fit Replacement — matches the original Honda specification for GC3000, GC3800, and HT3810 units, dropping in without modification
- Check Your Serial Number — Honda updates hardware specifications at production breaks; confirm your machine's serial number against the fitment table to ensure part number 90543-750-881 is current for your unit
A lock washer is a standard fastening component that resists loosening under vibration and load. On riding mowers and lawn tractors like the GC3000, GC3800, and HT3810, engine vibration and operating movement place constant stress on fastened joints throughout the machine. The lock washer's spring tension or serrated edge bites into both the fastener and the mating surface, preventing the nut or bolt from backing out over time. A missing or flattened lock washer allows fasteners to work loose during operation, which can lead to component misalignment or mechanical failure.
Part Details
| Part Number | 90543-750-881 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Lock Washer (5/16) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Lawn Tractor | HT3810 | All |
| Riding Mower | GC3000, GC3800 | 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.
