The Multiquip EM923350 3/4" Lock Washer is a genuine OEM fastener component designed for Mayco concrete pump models including the C30HD, C30HDGA, C30HDZ, C30HDN, C30HDNI, C30HDG, LS300, LS400, LS500, LS600, LS40D, LS40TD, and LS50TD, as well as walk-behind roller models V303E, V304EH, V304ER, and V304EY. As a genuine Multiquip OEM part, EM923350 is manufactured to the same standards as the original hardware, ensuring consistent clamping force and thread protection across every application it serves. This washer is a stock fastener replacement that keeps critical bolted connections from loosening under vibration and operational stress — exactly the conditions these machines encounter daily. Confirm your model against the fitment list and order with confidence knowing this is the correct part for your equipment.
Key Features
- Genuine OEM Hardware Grade — Manufactured to the same material hardness and surface finish spec as the original, ensuring consistent bite and spring tension under torque load.
- Drop-In Fastener Replacement — Sized at 3/4" to match the original bolt pattern directly; installs without rework on any of the listed assemblies.
- Broad Fitment Across Two Equipment Families — Compatible with Mayco C30HD and LS series concrete pumps (LS300, LS400, LS500, LS600, LS40D, LS40TD, LS50TD) and V30x series walk-behind vibratory rollers.
- Vibration Resistance — The lock washer's serrated or split profile resists self-loosening caused by the continuous vibration inherent to concrete pump and roller operation, maintaining joint integrity over extended service cycles.
- Critical Fastener Compliance — Using the correct OEM-spec lock washer on structural and drivetrain fasteners ensures bolted joints meet the designed clamping load, which is especially important on high-cycle, high-vibration equipment.
A lock washer is a small but essential fastener component placed beneath a nut or bolt head to prevent the fastener from backing out due to vibration, thermal cycling, or dynamic loading. On equipment like concrete pumps and vibratory rollers, bolted connections are subjected to constant mechanical stress, and a washer that loses tension can allow critical joints to loosen — leading to misalignment, accelerated wear on mating components, or outright fastener failure. Replacing worn, deformed, or missing lock washers with the correct OEM-spec part like the EM923350 restores proper clamping force and extends the service life of the surrounding assembly.
For questions about fitment or to verify this is the correct part for your machine, contact the DHS Equipment parts team directly.
Part Details
| Part Number | EM923350 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | 3/4" Lock Washer |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | C30HDGA |
| Mayco Pumps | C30HDZ |
| Mayco Pumps | C30HDG |
| Mayco Pumps | LS300 |
| Mayco Pumps | LS600 |
| Mayco Pumps | LS50TD |
| Mayco Pumps | LS40TD |
| Mayco Pumps | LS500 |
| Mayco Pumps | LS400 |
| Mayco Pumps | LS40D |
| Rollers | V303E |
| Rollers | V304EY |
| Rollers | V304ER |
| Rollers | V304EH |
| Mayco Pumps | C30HDNI Zenith |
| Mayco Pumps | C30HDN |
| Mayco Pumps | C30HDNI Precision |
| Mayco Pumps | C30HDNI |
| Mayco Pumps | C30HD |
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.
