The Honda 90451-ZA0-000 Lock Washer (30MM) is a genuine OEM component designed for a wide range of Honda generators, RV generators, horizontal shaft engines, and lawn tractors, including the EL5000, ES6500, EX5500, GX360, EV4010, EV6010, EVD4010, H4514, HT3813, and HT4213. As a direct Honda OEM part, it is manufactured to the exact specification required for correct function in each application. Always verify your machine's serial number against the fitment table, as Honda supersedes hardware at serial breaks and this 30MM washer must match your unit's original configuration.
Key Features
- Genuine OEM Hardware — sourced directly from Honda, this Lock Washer (30MM) meets the exact dimensional and load-bearing requirements Honda specifies for each fitted machine
- Broad Compatibility — listed for Honda generators (EL5000, ES6500, EX5500), RV generators (EV4010, EV6010, EVD4010), GX360 horizontal shaft engines, and lawn tractors (H4514, HT3813, HT4213)
- Serial Number Verification Recommended — Honda updates hardware specifications at production breaks; confirm your machine's serial number against the fitment table before ordering to ensure this is the correct washer for your unit
- Direct OEM Replacement — replaces the original 30MM lock washer with no rework or adaptation, keeping your service straightforward and the assembly correctly torqued
A lock washer works by creating resistance against loosening under vibration and dynamic loading. The 30MM diameter of this washer positions it at fastener joints where a larger bearing surface and secure retention are required. When a lock washer is missing, worn flat, or substituted with an incorrect size, fastener joints can lose clamping force over time as vibration cycles through the assembly, leading to loosening that may affect the integrity of the connection. Using the correct Honda OEM part number 90451-ZA0-000 ensures the washer seats properly and delivers the retention Honda's engineers designed into the joint.
Part Details
| Part Number | 90451-ZA0-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Lock Washer (30MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EL5000, ES6500, EX5500 | All |
| Horizontal Shaft Engine | GX360 | All |
| Lawn Tractor | H4514, HT3813, HT4213 | All |
| RV Generator | EV4010, EV6010, EVD4010 | 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.
