The Honda 90401-ZR4-F30 Washer (4mm) is a genuine OEM component designed for Honda EM3800, EM4000, EM5000, and EM6500 generators. As a direct Honda OEM part, it is manufactured to the same standards as the original hardware used on the production line. Verify your generator's serial number against the fitment table to confirm this is the correct washer for your unit before ordering.
Key Features
- Genuine Honda OEM Hardware — sourced directly from Honda, this washer meets the exact dimensional requirements of the original part it replaces.
- Correct 4mm Sizing — the 4mm specification must match your application; confirm the size against your existing hardware before installing.
- Broad Generator Compatibility — listed for the Honda EM3800, EM4000, EM5000, and EM6500 generators; check your serial number against the fitment table to verify applicability to your specific unit.
A washer distributes the clamping load of a fastener across a wider surface area, protecting the material beneath and helping the fastener maintain consistent holding force over time. On generators like the EM-series, washers are used throughout the assembly to prevent fastener loosening caused by vibration during operation. Using a washer of the wrong size or thickness can result in uneven clamping, fastener movement, or damage to the components being secured.
Part Details
| Part Number | 90401-ZR4-F30 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Washer (4mm) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EM3800, EM4000, EM5000, EM6500 | 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.
