The Multiquip 8164 Castle Nut 1-20 is a genuine OEM Castle Nut 1-20 designed for Essick, Whiteman, and MQ concrete and mortar mixer series, including EM12M, WM90PLF, WM90SLF, EM90SLF, EM70SLF, MC94P/S, MC64SK, MC64PK, MC64P/S, WM70PLF, WM70SLF, WM70S/P, MC94SK, MC94PK, MC44S, WM63H8, WM63H5, WM63E, MC12PH, WM120SH, WM120PH, EM120S, EM120P, WM90S/P, EM70P/S, and EM90P/S models. As a genuine Multiquip OEM part, the 8164 is manufactured to the same specification as the original hardware, ensuring a correct, secure fit with no guesswork on your end. Stocking this fastener means you can keep mixers turning without delays when worn or damaged hardware needs to be replaced.
Key Features
- Genuine OEM Hardware Grade — Manufactured to the same thread specification and material grade as the original castle nut, ensuring consistent torque retention and cotter pin alignment across mixer assemblies.
- Direct Bolt-On Replacement — Matches the 1-20 thread pitch of the original fastener, so it threads directly onto the existing shaft or spindle without modification to the surrounding hardware.
- Broad Mixer Compatibility — Fits a wide range of Essick EM, Whiteman WM, and MQ MC series concrete and mortar mixers, covering both steel and poly drum configurations.
- Maintains Positive Shaft Retention — The castle nut design allows a cotter pin to lock the nut in place, preventing loosening under the continuous vibration and rotation loads typical of mixer operation.
- Safety-Critical Fastener — Proper castle nut and cotter pin retention is essential to preventing drum shaft or blade assembly migration, which can lead to uncontrolled movement or mechanical failure during operation.
A castle nut is a slotted hex nut used in rotating shaft and axle applications where a positive mechanical lock is required. The slots, or castellations, allow a cotter pin or safety wire to pass through a drilled hole in the shaft, preventing the nut from backing off under vibration or cyclic loading. In mixer applications, the castle nut secures rotating components such as drum shafts or agitator blades. A missing, damaged, or incorrectly torqued castle nut can allow the retained component to work loose during operation, leading to premature bearing wear, shaft damage, or an unsafe condition.
Part Details
| Part Number | 8164 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Castle Nut 1-20 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Essick Mixers | EM12M Series |
| Whiteman Mixers | WM90PLF |
| Whiteman Mixers | WM90SLF |
| Essick Mixers | EM90SLF |
| Essick Mixers | EM70SLF |
| MQ Mixers | MC94P/S |
| MQ Mixers | MC64SK/MC64PK |
| MQ Mixers | MC64P/S |
| Whiteman Mixers | WM70PLF |
| Whiteman Mixers | WM70SLF |
| Whiteman Mixers | WM70S/P |
| MQ Mixers | MC94SK/MC94PK |
| MQ Mixers | MC44S |
| Whiteman Mixers | WM63SLF |
| Whiteman Mixers | WM63H8 |
| Whiteman Mixers | WM63H5 |
| Whiteman Mixers | WM63E |
| MQ Mixers | MC12PH |
| Whiteman Mixers | WM120SH |
| Whiteman Mixers | WM120PH |
| Essick Mixers | EM120S Series |
| Essick Mixers | EM120P Series |
| Whiteman Mixers | WM90S/P |
| Essick Mixers | EM70P/S |
| Essick Mixers | EM90P/S |
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.
