The Multiquip 20440 is a genuine OEM Hex Lock Nut M8-1.25 Deformed Thin designed for Whiteman ride-on power trowel models including HHXD5, HHXD5-ES, HHXDF4-DF5, HHXG5, HTX6H, HTXG6DF, and STX6H. As a factory-sourced fastener, part 20440 meets the exact thread pitch, material grade, and locking geometry specified for these machines. Using the correct OEM nut ensures the deformed-thread locking feature functions as intended, maintaining secure clamping force under the vibration and load cycles typical of ride-on trowel operation. DHS Equipment stocks this part to keep your Whiteman trowel running with confidence.
Key Features
- Deformed-Thread Locking Action — The intentionally deformed thread profile creates resistance against loosening under continuous vibration, eliminating the need for additional locking hardware at this fastener location.
- Correct M8-1.25 Thread Specification — Matches the exact metric thread pitch used in Whiteman ride-on trowel assemblies, ensuring full thread engagement and proper torque loading when installed.
- Genuine OEM Sourcing — Manufactured to Multiquip's material and dimensional standards, so the hardness grade and locking torque values align with the original design intent for these trowel platforms.
- Broad Whiteman Trowel Compatibility — Confirmed fit across HHXD5, HHXD5-ES, HHXDF4-DF5, HHXG5, HTX6H, HTXG6DF, and STX6H models — covering both hydrostatic and mechanical Whiteman ride-on trowel series.
- Structural Integrity Under Load — A correctly seated lock nut at critical fastener points prevents blade pitch components and drivetrain hardware from backing out during operation, protecting the machine from accelerated wear or mechanical failure.
A hex lock nut with a deformed thread profile is a single-use fastener engineered to resist vibration-induced loosening without relying on a separate locking element such as a washer or patch. The deformed section of the nut's threads creates an interference fit against the mating bolt threads, generating consistent prevailing torque that keeps the connection tight through the constant vibration produced during concrete finishing. When a lock nut becomes worn, cross-threaded, or is reused past its service life, it loses the clamping force needed to hold critical assemblies in position — increasing the risk of component movement, accelerated wear on adjacent parts, and potential mechanical failure during operation.
Need help confirming this part fits your machine? Contact the DHS Equipment team for fitment support.
Part Details
| Part Number | 20440 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hex Lock Nut M8-1.25 Deformed Thin |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HHXD5 |
| Whiteman Ride-On Power Trowels | HHXD5-ES |
| Whiteman Ride-On Power Trowels | HHXDF4-DF5 |
| Whiteman Ride-On Power Trowels | HHXG5 |
| Whiteman Ride-On Power Trowels | HTX6H |
| Whiteman Ride-On Power Trowels | HTXG6DF |
| Whiteman Ride-On Power Trowels | STX6H |
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.
