The Husqvarna 593500001 Lock Nut is a genuine OEM replacement designed for Husqvarna HTC and DURATIQ floor grinders, including the HTC80, HTCD80, PG8S, PG6S, PG8D, PG8XR, HTC1500, HTC950RX, HTCX8, HTCRX8, HTCGL400, HTC80iD, DuratiqT5, DuratiqT6, DuratiqT8, DuratiqX6, DuratiqX8, DURATIQX8, DURATIQT5, DURATIQT6, DURATIQX6, HTCT5, and HTCT8 floor grinders. As a genuine Husqvarna OEM part, this Lock Nut is manufactured to the same specification as the original component, ensuring a consistent, secure fit across the full range of compatible machines. Cross-reference part number 593500001 against your parts diagram to confirm the correct application before ordering. DHS Equipment supplies this part to help keep your equipment running at full capacity.
Key Features
- Genuine OEM Thread Specification — manufactured to Husqvarna's exact thread pitch and torque rating, ensuring the nut seats and locks correctly without risk of cross-threading or premature loosening.
- Drop-In Replacement — this Lock Nut installs directly into the same position as the original, with no reworking of the mating hardware required.
- Broad Floor Grinder Compatibility — fits across the HTC, DURATIQ, and PG series floor grinders, covering both professional walk-behind and ride-on planetary grinding platforms.
- Secure Fastening Under Load — a correctly functioning lock nut maintains clamping force through vibration and continuous grinding cycles; a worn or damaged nut can allow components to shift, causing uneven disc wear and loss of grinding control.
- Structural Fastener Safety — on rotating grinding assemblies, fastener integrity is critical to safe operation; using the correct OEM-spec Lock Nut maintains the mechanical integrity of the assembly.
A lock nut is a threaded fastener engineered to resist loosening under vibration and dynamic load — both of which are constant forces during floor grinding operations. Unlike a standard nut, its locking feature (whether a nylon insert, deformed thread, or castellated profile) creates additional friction or mechanical interference that prevents rotation under load. On floor grinders and surface preparation equipment, lock nuts secure rotating assemblies, disc carriers, and drive components where any unintended movement would affect grinding consistency or create a safety hazard. When a lock nut wears, strips, or loses its locking resistance, the fastened assembly can shift or come loose during operation, leading to component damage and unsafe working conditions.
Part Details
| Part Number | 593500001 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Lock Nut |
Compatibility & Fitment
| Name | Model |
|---|---|
| Dust & Slurry Equipment | HTC80 |
| Dust & Slurry Equipment | HTCD80 |
| Floor Grinder | DuratiqT5 |
| Floor Grinder | DuratiqT6 |
| Floor Grinder | DuratiqT8 |
| Floor Grinder | DuratiqX6 |
| Floor Grinder | DuratiqX8 |
| Floor Grinder | HTCT5 |
| Floor Grinder | HTCT8 |
| Floor Grinder | PG8S |
| Floor Grinder | HTC1500 |
| Floor Grinder | HTC950RX |
| Floor Grinder | HTCX8 |
| Floor Grinder | PG6S |
| Floor Grinder | PG8D |
| Floor Grinder | PG8XR |
| Floor Grinder | DURATIQX8 |
| Floor Grinder | HTCGL400 |
| Floor Grinder | DURATIQT5 |
| Floor Grinder | DURATIQT6 |
| Floor Grinder | DURATIQX6 |
| Floor Grinder | HTC80iD |
| Floor Grinder | HTCRX8 |
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.
