The Husqvarna 539990042 Cotter Pin 1/8" x 1-1/4" is a genuine OEM fastener designed for the CT36 and CT48 ride-on power trowels and the Pro65G floor saw. As an original equipment component, this cotter pin matches the exact dimensions specified by Husqvarna, ensuring correct installation and a secure mechanical connection. DHS Equipment supplies this part to help keep your equipment running at full capacity. Cross-reference part number 539990042 against your parts diagram to confirm fitment before ordering.
Key Features
- OEM-Specified Dimensions — Manufactured to Husqvarna's exact 1/8" x 1-1/4" specification, ensuring the correct retention and shear characteristics for its designated pin location.
- Drop-In Replacement — This cotter pin installs directly into the factory pin bore with no alteration needed, restoring the mechanical assembly to its original secured state.
- Broad Equipment Compatibility — Fits the CT36 and CT48 ride-on power trowels as well as the Pro65G floor saw, making it a versatile fastener across Husqvarna construction equipment families.
- Prevents Unintended Disengagement — A correctly fitted cotter pin locks pins and shafts in place, preventing components from backing out during operation and maintaining the integrity of the assembly.
- Safety-Critical Fastener — Cotter pins secure load-bearing and moving assemblies; using an OEM-specified pin ensures the correct retention force is maintained, reducing the risk of unexpected mechanical failure during use.
A cotter pin is a small but critical split fastener inserted through a drilled hole in a pin or bolt to prevent it from working loose under vibration and load. Once inserted and bent open, it locks the assembly in place, stopping axle pins, clevis pins, or linkage pins from backing out during machine operation. When a cotter pin breaks, deforms, or goes missing, the component it secures can shift or disengage entirely, leading to loss of control of the assembly and potential damage to surrounding parts. Replacing a worn or failed cotter pin with the correct OEM part restores the mechanical lock and keeps the connection secure through normal operating stresses.
Part Details
| Part Number | 539990042 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Cotter Pin 1/8" x 1-1/4" |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Trowel | CT36 |
| Power Trowel | CT48 |
| Floor Saw | Pro65G |
| Floor Saw | PRO65G |
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.
