The Honda 90504-ZA1-811 Spring Washer (5mm) is a genuine OEM component designed for EW140, EW170, EW171, and EXW171 welder generators. As a direct OEM replacement, this washer is sourced to Honda's own specifications, ensuring it matches the original hardware exactly. Confirm your unit's serial number against the fitment table before ordering, as Honda periodically updates hardware specifications at production breaks.
Key Features
- Genuine OEM Hardware — sourced directly from Honda, this spring washer matches the original 5mm specification built into EW140, EW170, EW171, and EXW171 welder generators at the factory
- Exact-Fit Replacement — the 5mm sizing is a precise match for the fastener hardware used in these welder generators, so installation requires no modification
- Serial Number Awareness — Honda supersedes hardware at production breaks; always verify your machine's serial number against the fitment table to confirm part number 90504-ZA1-811 is correct for your unit
- Fastener Integrity — a spring washer in good condition maintains consistent clamping force on fastened joints; a fatigued or missing washer allows connections to loosen under the vibration loads typical of generator and welding operation
A spring washer is a split, slightly helical ring that sits between a fastener and the surface it bears against. As the fastener is tightened, the washer deflects and stores tension, which pushes back against the fastener and resists loosening caused by vibration and thermal cycling. In a welder generator — a machine subject to both continuous engine vibration and the additional load cycles of welding output — maintaining clamping force at fastened joints is essential to keeping assemblies secure and performing as intended. When a spring washer loses its temper or is omitted, fasteners can back out over time, potentially causing components to shift or rattle loose.
Part Details
| Part Number | 90504-ZA1-811 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Spring Washer (5mm) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Welder Generator | EW140 | 1000001-1002411 |
| Welder Generator | EW170, EW171, EXW171 | 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.
