The Husqvarna 539990196 Nut 5/16-18 is a genuine OEM fastener used across a broad range of Husqvarna construction equipment, including the CRT48PS power trowel, PP2525DS, PP2525DTR, and PP3030 power packs, FS4600G, Pro65G, and RS8500D floor saws, and the MS510 and MS510G tile and masonry saws. As a factory-sourced component, this nut meets the exact thread specification and dimensional tolerances set by Husqvarna, ensuring a secure, correctly tensioned connection wherever it is installed. Cross-reference part number 539990196 against your machine's parts diagram to confirm the correct application before ordering. DHS Equipment supplies this part to help keep your equipment running with verified OEM hardware.
Key Features
- Genuine OEM Thread Specification — Manufactured to Husqvarna's exact 5/16-18 UNC thread standard, ensuring full thread engagement and proper torque retention across all listed applications.
- Direct Hardware Replacement — Matches the original fastener in thread pitch, drive type, and bearing surface dimensions for a drop-in installation with no rework required.
- Broad Equipment Compatibility — Fits the CRT48PS power trowel, PP2525DS, PP2525DTR, and PP3030 power packs, FS4600G, Pro65G, and RS8500D floor saws, and the MS510 and MS510G tile and masonry saws.
- Structural Integrity Where It Counts — Using the correct OEM-spec fastener maintains proper clamp load on critical assemblies, preventing loosening under vibration and load during heavy-duty cutting, compaction, and finishing work.
- Verified OEM Part Number — Sourced directly from Husqvarna as a genuine replacement; cross-reference 539990196 with your parts diagram to confirm the exact installation point before ordering.
A 5/16-18 nut is a standard coarse-thread fastener used to secure components within machine assemblies, guard systems, and structural connections. It works in conjunction with a mating bolt or stud to clamp parts together under a controlled load, preventing movement or separation during operation. When a fastener is damaged, stripped, or installed with incorrect thread specifications, the joint can loosen under vibration — compromising the integrity of the assembly and potentially causing premature wear or component failure. Using the correct OEM-specification replacement ensures the fastener performs as the machine was designed to operate.
Part Details
| Part Number | 539990196 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Nut 5/16-18 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Trowel | CRT48PS |
| Power Pack | PP2525DS |
| Power Pack | PP2525DTR |
| Floor Saw | FS4600G |
| Tile & Masonry Saw | MS510 |
| Floor Saw | Pro65G |
| Floor Saw | PRO65G |
| Floor Saw | RS8500D |
| Power Pack | PP3030 |
| Tile & Masonry Saw | MS510G |
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.
