The Husqvarna 593506501 Lock Nut is a genuine OEM fastener designed for DURATIQ and HTC series floor grinders, including the DuratiqX6, DuratiqX8, DuratiqT6, DuratiqT8, HTCX8, HTCT8, HTCRX8, HTC800RXP, and HTC1500. As a factory-original component, this lock nut matches Husqvarna's exact thread specification and material grade for these professional floor grinding systems. Confirm part number 593506501 against your machine's parts diagram before ordering to ensure correct fitment. DHS Equipment supplies this part to help keep your equipment running at full capacity.
Key Features
- Genuine OEM Thread and Material Specification — manufactured to Husqvarna's precise thread form and hardness grade, ensuring the correct clamping force and resistance to loosening under the vibration loads typical of floor grinding operation.
- Drop-In Fastener Replacement — this lock nut installs directly in place of the original, requiring only standard tooling and no modification to the surrounding assembly.
- Broad DURATIQ and HTC Grinder Compatibility — fits DuratiqX6, DuratiqX8, DuratiqT6, DuratiqT8, HTCX8, HTCT8, HTCRX8, HTC800RXP, HTCT8, and HTC1500 floor grinders; cross-reference 593506501 against your parts diagram to confirm.
- Secure Assembly Integrity — a properly torqued lock nut prevents fastener backing-out during continuous grinding cycles, protecting adjacent components from misalignment or mechanical damage.
- Backed by Husqvarna OEM Quality — sourced directly through the Husqvarna OEM parts channel, giving tradespeople and contractors confidence that this fastener meets the same standards as the original build.
A lock nut is a self-locking fastener engineered to resist loosening caused by vibration and dynamic loads. In a floor grinder like the DURATIQ and HTC models, rotating grinding heads generate sustained vibration that can cause standard nuts to back off over time, compromising the clamping force that holds assemblies together. Using the correct OEM lock nut ensures the locking mechanism — whether a nylon insert, prevailing-torque profile, or deformed thread — functions as designed, maintaining secure fastener engagement throughout demanding grinding and surface preparation work.
Part Details
| Part Number | 593506501 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Lock Nut |
Compatibility & Fitment
| Name | Model |
|---|---|
| Floor Grinder | DuratiqX6 |
| Floor Grinder | DuratiqX8 |
| Floor Grinder | HTCT8 |
| Floor Grinder | HTCX8 |
| Floor Grinder | DURATIQX8 |
| Floor Grinder | HTC800RXP |
| Floor Grinder | DURATIQT6 |
| Floor Grinder | HTCRX8 |
| Floor Grinder | DuratiqT6 |
| Floor Grinder | DuratiqT8 |
| Floor Grinder | HTC1500 |
| Floor Grinder | DURATIQX6 |
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.
