The Honda 90401-437-000 Plain Washer (10MM) is a genuine OEM component designed for a wide range of Honda generators, engines, tractors, snow blowers, and welder generators, including the E4500, EB4000, EM4000, EMS4000, EMS4500, ES4500, EV4000, EW170, G400, GV400, GXV390, H5013, H5518, HS1336, HSM1336, HT3810, and RT5000. As a genuine Honda part, it is manufactured to the same specification as the original hardware installed at the factory. Because Honda supersedes hardware across a broad range of equipment, always verify your machine's model and serial number against the fitment table before ordering. This washer ships as a single piece — order the quantity your service job requires.
Key Features
- Genuine OEM Hardware — sourced directly from Honda, ensuring the correct 10MM bore diameter and dimensional tolerances for proper load distribution across the fastening point
- Broad Fitment — listed for Honda generators, vertical and horizontal shaft engines, multi-purpose tractors, lawn tractors, two-stage snow blowers, and a welder generator, including the GXV390, HS1336, and EW170
- Check Your Serial Number — Honda updates hardware specifications at production breaks; confirm your unit's serial number against the fitment table to ensure part number 90401-437-000 is correct for your machine
A plain washer distributes the clamping load of a bolt or nut across a wider surface area, preventing the fastener from pulling through or marring the material beneath it. Without the correct washer in place, a fastener can work loose over time or damage the surface it bears against, compromising the integrity of the assembly. Using the correct OEM-specified washer ensures the fastener torques down properly and maintains its holding force through normal vibration and operating loads.
Part Details
| Part Number | 90401-437-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Plain Washer (10MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EB4000, EM4000, EMS4000, EMS4500 | 1011783-9999999 |
| Generator | E4500, ES4500, EV4000 | 1297698-9999999 |
| Horizontal Shaft Engine | G400 | 1297698-9999999 |
| Lawn Tractor | HT3810 | All |
| Multi-Purpose Tractor | H5013, H5518, RT5000 | All |
| Two-Stage Snow Blower | HS1336, HSM1336 | All |
| Vertical Shaft Engine | GV400 | 2011826-9999999 |
| Vertical Shaft Engine | GXV390 | All |
| Welder Generator | EW170 | 1011783-9999999 |
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.
