The Husqvarna 506747401 Coupling Nut M8 x 38mm is a genuine OEM fastener designed for the FS6800D, FS6600DT, and FS6600DJDT floor saws. As a direct OEM replacement, this coupling nut is manufactured to Husqvarna's exact specifications, ensuring a correct and secure fit without modification. DHS Equipment supplies this part to help keep your floor saw operating at full capacity. Cross-reference part number 506747401 against your parts diagram to confirm fitment before ordering.
Key Features
- OEM-Grade Fastener Integrity — Manufactured to Husqvarna's exact thread pitch and dimensional specifications, ensuring the coupling holds under the sustained vibration and load demands of concrete cutting.
- Direct Bolt-In Replacement — This M8 x 38mm coupling nut is engineered to seat and torque exactly as the original, with no reworking of mounting hardware required.
- Broad Floor Saw Compatibility — Confirmed fitment across the FS6800D, FS6600DT, and FS6600DJDT floor saws, covering key models in Husqvarna's heavy-duty walk-behind flat saw lineup.
- Restored Coupling Security — A worn or damaged coupling nut can introduce play and misalignment at the drive connection; replacing it with a correctly sized OEM unit restores the rigid mechanical linkage the machine depends on.
- Genuine Husqvarna OEM Part — Supplied as an original equipment component, not an approximation — so thread engagement, material grade, and hex dimensions match what the assembly was built around.
A coupling nut is a threaded fastener used to join two male-threaded components end-to-end, or to secure a shaft connection within a drive assembly. In a floor saw application, this type of fastener plays a role in maintaining the rigid mechanical link between drive components, keeping alignment tight and preventing unwanted movement under load. When a coupling nut becomes worn, stripped, or loose, it can cause vibration, misalignment, or loss of drive engagement — affecting both cut quality and operator control.
Part Details
| Part Number | 506747401 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Coupling Nut M8 x 38mm |
Compatibility & Fitment
| Name | Model |
|---|---|
| Floor Saw | FS6800D |
| Floor Saw | FS6600DT |
| Floor Saw | FS6600DJDT |
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.
