The Multiquip 12426 Castle Nut is a genuine OEM fastener designed for a wide range of Multiquip and Whiteman equipment, including the RX1575 walk-behind roller, HHNG5, HTN28K, HTN27K, and HHN34TVD ride-on power trowels, WM120SH and WM120PH Whiteman mortar mixers, and EM120S and EM120P Series Essick mixers. As a direct OEM replacement, part 12426 is manufactured to the exact dimensions and specifications required for proper retention and torque performance in these applications. Sourced directly through DHS Equipment, this is the correct castle nut to keep your machine running as designed. Verify your model against the fitment list to confirm compatibility before ordering.
Key Features
- Genuine OEM Specification: — Manufactured to the exact thread pitch, hardness grade, and slot geometry required for secure cotter pin retention across all compatible models.
- Broad Cross-Equipment Compatibility: — Fits RX1575 walk-behind rollers, HHNG5, HTN27K, HTN28K, HHN31V, and HHN34TVD ride-on trowels, WM120SH, WM120PH, EM120S Series, and EM120P Series mixers.
- Drop-In Replacement: — Matches the original fastener's thread size and castle profile, allowing straightforward installation with a cotter pin without reworking surrounding hardware.
- Fastener Integrity: — The slotted castle design locks the nut in position under vibration and load, preventing backing-off on rotating or high-cycle assemblies where a standard hex nut would work loose.
- Safety-Critical Retention: — Castle nuts are used on wheel hubs, spindle ends, and linkage pivot points where unintended loosening can lead to loss of control or structural failure; using the correct OEM-spec nut is essential in these locations.
A castle nut is a slotted hex fastener designed to work in conjunction with a cotter pin or safety wire to prevent the nut from rotating loose under vibration, cyclic loading, or continuous machine operation. The slots cut into the top of the nut align with a hole in the bolt or shaft, allowing a cotter pin to lock the assembly in place permanently until intentionally removed during service. When a castle nut becomes damaged, stripped, or loses its slot integrity, it can no longer retain the cotter pin correctly, allowing critical fastened joints — such as wheel hubs, steering pivots, or drive linkages — to work loose during operation.
Part Details
| Part Number | 12426 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Castle Nut |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rollers | RX1575 |
| Whiteman Ride-On Power Trowels | HHNG5 |
| International Ride-On Power Trowels | EHHNK5 |
| International Ride-On Power Trowels | HTNS5S-2 |
| Whiteman Mixers | WM120SH |
| Whiteman Mixers | WM120PH |
| Essick Mixers | EM120S Series |
| Essick Mixers | EM120P Series |
| Whiteman Ride-On Power Trowels | HTN28K |
| Whiteman Ride-On Power Trowels | HTN27K |
| Whiteman Ride-On Power Trowels | HHN34TVD |
| Whiteman Ride-On Power Trowels | HHN31V |
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.
