The Honda 90106-HW1-671 Flange Bolt (10X25) is a genuine OEM fastener designed for BF40 and BF50 outboard motors. Sourced directly from Honda, this bolt matches the original specification installed at the factory, ensuring a correct, secure fit without any guesswork. Genuine OEM hardware means the thread pitch, shank length, and flange diameter are exactly what Honda engineers specified for these outboards.
Key Features
- Genuine OEM Specification — an authentic Honda part carrying the correct thread form, shank length, and integrated flange geometry for BF40 and BF50 outboard motors.
- Direct Drop-In Replacement — dimensioned to Honda's original drawing, so this bolt installs without reworking or sourcing alternative hardware.
- Broad Serial-Range Coverage — Honda supersedes hardware at production breaks, so verify your outboard's serial number against the fitment table before ordering to confirm part number 90106-HW1-671 is correct for your unit.
- Flange Design Distributes Clamping Load — the integrated flange spreads the clamping force across a wider bearing surface compared to a standard hex bolt, reducing the risk of fastener loosening under the vibration and marine operating conditions these outboards encounter.
A flange bolt combines a standard threaded fastener with a wide, integral washer-like flange at the base of the head. In outboard motor applications, this design distributes clamping load evenly across the mating surface, helping to maintain a secure joint even under the continuous vibration and load cycles an outboard experiences during operation. When a flange bolt stretches, corrodes, or is damaged, it can no longer maintain the clamping force the joint requires — replacing it with the correct OEM fastener restores the connection to its designed specification.
Part Details
| Part Number | 90106-HW1-671 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Flange Bolt (10X25) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Outboard Motor | BF40, BF50 | 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.
