The Honda 90091-ZS4-003 Bolt-Washer (5X170) is a genuine OEM fastener designed for EZ3500 and EZ5000 generators. As a direct Honda OEM part, it meets the exact specifications Honda engineering calls for on these machines. Confirm your generator's serial number against the fitment table to ensure part number 90091-ZS4-003 is the correct listing for your unit before ordering.
Key Features
- Genuine Honda OEM — sourced directly from Honda, so the dimensions and thread spec match what was installed at the factory on EZ3500 and EZ5000 generators.
- Integrated Washer Design — the washer flange is part of the fastener itself, distributing clamping load evenly without a separate washer to keep track of during assembly.
- Serial Number Verification Recommended — Honda supersedes hardware at production breaks, so cross-check your generator's serial number against the compatibility table to confirm this is the right listing for your machine.
A bolt-washer is a fastener that combines a bolt and a captive washer flange into a single piece. The integrated flange spreads the clamping force across a wider surface area than a standard bolt alone, helping to secure components firmly without concentrating stress at a single point. When a fastener like this is missing, damaged, or replaced with an incorrect substitute, proper clamping load cannot be maintained, which can allow assembled components to loosen over time during generator operation.
Part Details
| Part Number | 90091-ZS4-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Bolt-Washer (5X170) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EZ3500, EZ5000 | 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.
