The Husqvarna 531117309 Lock Nut M16 is a genuine OEM fastener designed for the FS700E floor saw. As a direct Husqvarna OEM component, this lock nut is manufactured to the exact thread pitch, hardness grade, and dimensional tolerances required for secure, lasting engagement on the FS700E. Cross-reference part number 531117309 against your parts diagram to confirm the correct application before installation. DHS Equipment supplies this part to help keep your equipment running at full capacity.
Key Features
- OEM Thread and Grade Specification — manufactured to Husqvarna's exact M16 thread pitch and hardness requirements, ensuring consistent clamping force and resistance to loosening under machine vibration.
- Drop-In Fastener Replacement — matches the original M16 thread form exactly, so this lock nut seats and torques correctly without rework or modification to mating components.
- FS700E Floor Saw Fitment — engineered specifically for the FS700E walk-behind floor saw, confirming compatibility with the machine's fastener interfaces as assembled at the factory.
- Vibration-Resistant Locking Action — the locking feature prevents self-loosening during high-vibration cutting operations, maintaining the integrity of the assembly it secures throughout extended use.
- Structural Assembly Integrity — a worn or damaged lock nut can allow critical assemblies to shift or work loose mid-operation; replacing it with this genuine OEM part restores proper joint security.
A lock nut is a fastener designed to resist loosening caused by vibration and dynamic loads — a common challenge on walk-behind floor saws like the FS700E, which generate significant vibration during concrete cutting. Unlike a standard hex nut, a lock nut incorporates a locking mechanism that maintains clamping force even as the machine cycles through repeated load changes. When a lock nut becomes stripped, corroded, or fails to hold torque, the assembly it secures can shift or separate, leading to misalignment, accelerated wear on surrounding components, or an unsafe operating condition. Replacing it promptly with the correct OEM-specification part restores the joint to its designed clamping load.
Part Details
| Part Number | 531117309 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Lock Nut M16 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Floor Saw | FS700E |
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.
