The Multiquip EM492624 is a genuine OEM Lock Washer 3/8 designed for a wide range of Multiquip and Whiteman equipment, including WM70, WM90, EM70, EM90, WTB-16, WBH-16, PRO20, C30HDZ, AR13H, and AR13HC models. As a direct OEM replacement sourced through Multiquip's authorized parts network, EM492624 meets the original engineering specifications for fastener retention across these machine families. Confirm your model number before ordering to ensure a correct application match. DHS Equipment stocks genuine Multiquip parts to keep your equipment running with the hardware it was built with.
Key Features
- Genuine OEM Hardness and Temper Rating — Manufactured to the original spring-tension specification so the washer bites and holds under vibration the way the machine was designed to perform.
- Drop-In Hardware Replacement — Sized to the 3/8 fastener thread series used throughout these machines; installs directly onto existing bolts and studs without rework.
- Broad Multiquip Fleet Coverage — A single part number covers Whiteman mortar mixers (WM70, WM90), Essick mixers (EM70, EM90, PRO20), Whiteman power buggies (WTB-16, WBH-16 series), Mayco concrete pumps (C30HDZ), and asphalt rollers (AR13H, AR13HC).
- Vibration Resistance Where It Counts — The helical split design maintains clamp load on fasteners subjected to continuous engine vibration and heavy-duty work cycles, preventing bolt back-off over time.
- Correct Fastener Security for Moving Assemblies — Using the specified OEM washer ensures torque values and clamping forces remain within the original design envelope, protecting adjacent components from loosening-related wear.
A lock washer sits between a fastener and the mating surface to prevent the bolt or nut from backing out under vibration and dynamic loading. The split in a helical lock washer acts as a spring, maintaining tension against the fastener face even as the assembly flexes or vibrates during operation. When a lock washer is missing, deformed, or over-compressed from reuse, it loses its spring action — allowing fasteners to loosen progressively, which can lead to misalignment, component damage, or failure of the assembly it secures. Replacing worn or damaged lock washers with a correct OEM-spec part is one of the simplest ways to protect the integrity of a bolted joint during routine service.
Part Details
| Part Number | EM492624 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Lock Washer 3/8 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Mixers | WM70S/P |
| Power Buggies | WTB-16 |
| Power Buggies | WTB-16PD |
| Mayco Pumps | C30HDZ |
| Whiteman Mixers | WM90S/P |
| Essick Mixers | EM70P/S |
| Power Buggies | WBH-16F |
| Power Buggies | WBH-16EF |
| Power Buggies | WBH-16E |
| Power Buggies | WBH-16 |
| Essick Mixers | PRO20 |
| Power Buggies | WBH21EPA |
| Mayco Pumps | C30HDNI Zenith |
| Rollers | AR13HC |
| Rollers | AR13H |
| 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.
