The Honda 90021-ZA1-000 Hexagon Bolt (10X235) is a genuine OEM fastener built for Honda EB4000, EM4000, EMS4000, and EMS4500 generators. As a direct Honda OEM part, it is manufactured to the exact dimensions and thread specification Honda requires for this application. Verify your generator's serial number against the fitment table to confirm this is the correct bolt for your unit before ordering.
Key Features
- Genuine Honda OEM Fastener — sourced directly from Honda, this bolt carries the exact thread pitch, diameter, and length (10 x 235) specified for these generators, ensuring a correct and secure installation.
- Fits Four Honda Generator Models — listed for the EB4000, EM4000, EMS4000, and EMS4500 generators; check your serial number against the fitment table to confirm applicability to your specific unit.
- Direct OEM Replacement — replacing a worn, damaged, or missing fastener with part number 90021-ZA1-000 restores the assembly to Honda's original specification without the need for sizing guesswork.
A hex bolt of this length serves as a structural fastener within the generator assembly, drawing and holding components together at the torque and clamping load Honda engineered for that joint. Using a fastener of the wrong length or thread pitch risks an improperly clamped assembly; using the correct OEM replacement ensures the joint behaves as designed throughout the generator's service life.
Part Details
| Part Number | 90021-ZA1-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Hexagon Bolt (10X235) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EB4000, EM4000, EMS4000, EMS4500 | 1035477-9999999 |
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.
