The Husqvarna 539990122 Washer is a genuine OEM component designed for a wide range of Husqvarna Construction equipment, including FS-series floor saws, MS-series tile and masonry saws, and PP-series power packs. As a direct OEM replacement, this washer is produced to the same specifications as the original hardware used in factory assembly, ensuring a flush, correctly torqued connection every time. It is confirmed to fit models including the FS4600G, FS4800D, FS6600D, FS6600DT, FS6600DJDT, FS6800D, FS7000DL, FS8400D, Pro65G, PRO65G, RS8500D, MS355, MS355G, MS510, MS510G, MS610, PP2525DTR, PP2525DS, and PP518. Cross-reference part number 539990122 against your parts diagram to confirm the correct application before ordering. DHS Equipment supplies this part to help keep your equipment running.
Key Features
- Genuine OEM Hardware Grade — Manufactured to Husqvarna's exact material and dimensional specification, delivering the correct load distribution and clamping force for the fastener joint it serves.
- Drop-In Replacement — Matches the original hole diameter, outer diameter, and thickness so it seats correctly against mating surfaces without shimming or adjustment.
- Broad Equipment Compatibility — Fits FS-series floor saws, MS-series tile and masonry saws, and PP-series power packs across multiple model years, making it a versatile hardware item for mixed Husqvarna Construction fleets.
- Protects Fastener Joints Under Load — A correctly sized washer distributes clamping load evenly across the contact surface, preventing fastener pull-through and surface damage on aluminum or composite housings.
- Verified Part Number — Ordering by Husqvarna article number 539990122 eliminates guesswork when sourcing hardware replacements during scheduled maintenance or field repair.
A washer serves as a load-distributing interface between a fastener — bolt head or nut — and the surface it clamps against. By spreading the clamping force over a larger contact area, it prevents the fastener from biting into or pulling through softer materials such as aluminum housings and composite covers. On construction equipment that operates under sustained vibration — floor saws, masonry saws, and hydraulic power packs — washers also help resist fastener loosening over time. When a washer is missing, undersized, or deformed, the fastener joint loses clamping integrity, which can lead to loose assemblies, surface damage, and eventual component failure.
Part Details
| Part Number | 539990122 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Washer |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Pack | PP2525DTR |
| Floor Saw | FS4600G |
| Floor Saw | FS4800D |
| Floor Saw | FS6600D |
| Floor Saw | FS6800D |
| Floor Saw | FS7000DL |
| Floor Saw | FS8400D |
| Tile & Masonry Saw | MS355 |
| Tile & Masonry Saw | MS355G |
| Tile & Masonry Saw | MS510 |
| Floor Saw | Pro65G |
| Tile & Masonry Saw | MS510G |
| Floor Saw | RS8500D |
| Tile & Masonry Saw | MS610 |
| Floor Saw | FS6600DT |
| Floor Saw | FS6600DJDT |
| Power Pack | PP2525DS |
| Power Pack | PP518 |
| Floor Saw | PRO65G |
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.
