The Honda 90111-KT0-670 Flange Bolt (8X50) is a genuine OEM fastener designed for GX630, GX660, GX690, GX700, and GX800 horizontal shaft engines. As a direct Honda OEM part, it is manufactured to the exact dimensions Honda specifies for these engines, ensuring correct thread engagement and clamping load. This Flange Bolt (8X50) is listed for use across the GX630, GX660, GX690, GX700, and GX800 engine series — confirm part number 90111-KT0-670 against your engine's serial number and Honda parts diagram before ordering.
Key Features
- Genuine OEM Fastener — sourced directly from Honda, this flange bolt meets the exact thread pitch, shank length, and flange diameter specified for these large-displacement horizontal shaft engines.
- Integrated Flange Design — the built-in flange distributes clamping load across a wider bearing surface, reducing the need for a separate washer and maintaining consistent clamp force at the joint.
- Broad GX-Series Coverage — listed for GX630, GX660, GX690, GX700, and GX800 engines; check your engine's serial number against the fitment table to confirm this is the correct bolt position for your application.
A flange bolt combines a standard hex bolt with an integrated washer-like flange beneath the head. In an engine assembly, this design spreads clamping force over a larger surface area than a plain bolt head alone, helping to keep fastened components seated securely under the vibration and thermal cycling that large-displacement engines produce. When a flange bolt stretches, corrodes, or is damaged during disassembly, replacing it with the correct OEM specification part restores the designed clamping load at that joint — using an incorrect thread pitch or length can result in undertorqued or overtorqued connections that compromise the integrity of the assembly.
Part Details
| Part Number | 90111-KT0-670 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Flange Bolt (8X50) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX630, GX660, GX690, GX700, GX800 | 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.
