The Husqvarna 522919401 Lock Nut is a genuine OEM fastener designed for a wide range of Husqvarna Construction machines, including the PG690, PG830, and PG830RC floor grinders, CRT36, CRT48, and CRT60X power trowels, and additional surface preparation and dust management equipment. As a direct OEM replacement, this Lock Nut is manufactured to Husqvarna's exact specifications, ensuring a correct and secure fit every time. Cross-reference part number 522919401 against your parts diagram to confirm compatibility with your specific machine. DHS Equipment supplies this part to help keep your equipment running at full capacity.
Key Features
- Genuine OEM Fastener Grade — Manufactured to Husqvarna's exact torque and thread specifications, delivering the clamping integrity this fastener must maintain under sustained machine operation.
- Direct Drop-In Replacement — Threads match the original hardware exactly, so installation is straightforward with no reworking of mating components.
- Broad Equipment Compatibility — Fits multiple Husqvarna floor grinders including the PG690, PG830, and PG8D families, power trowels including the CRT36, CRT48, and CRT60X, plus shot blasters and steel blasters in the Husqvarna surface prep lineup.
- Maintains Secure Assembly Integrity — A correctly torqued lock nut prevents fastener back-off caused by vibration, keeping critical assemblies tight throughout demanding surface preparation cycles.
- Verified OEM Part Number — Ordering by part number this part ensures you receive the exact hardware specified for your machine, eliminating guesswork when sourcing hardware replacements.
A lock nut is a threaded fastener engineered to resist loosening under vibration and dynamic loads — conditions that are constant on floor grinders, power trowels, and shot blasting equipment. Unlike a standard nut, its locking feature creates a prevailing torque that keeps the fastener seated even as the machine cycles through heavy-duty work. When a lock nut loosens or fails, the assembly it secures can shift, leading to misalignment, accelerated wear on adjacent components, or mechanical failure mid-operation. Replacing a worn or damaged lock nut with the correct OEM part restores the holding strength the original design depends on.
Part Details
| Part Number | 522919401 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Lock Nut |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Trowel | CRT60X |
| Power Trowel | CRT48 |
| Dust & Slurry Equipment | DC975 |
| Floor Grinder | PG690RC |
| Floor Grinder | PG8DR |
| Floor Grinder | PG830 |
| Floor Grinder | PG830RC |
| Shot Blaster | Blastrac2-20DT |
| Steel Blaster | EBE900V |
| Floor Grinder | PG690 |
| Power Trowel | CRT36 |
| Floor Grinder | HTCXP6 |
| Floor Grinder | PG6P |
| Floor Grinder | PG690P |
| Floor Grinder | PG8D |
| Shot Blaster | Blastrac1-10DPS75 |
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.
