Multiquip EM923343 Lock Washer 5/16 In

The Multiquip EM923343 is a genuine OEM Lock Washer 5/16 In designed for a wide range of Multiquip, Whiteman, Essick, and Mayco equipment spanning concrete pumps, mixers, rollers, power buggies, and trash pumps. As a factory-original component, EM923343 is manufactured to the same specifications as the part it replaces, ensuring correct fit across compatible models. Verified fitment includes LS600, LS300, LS400, LS500, AR13H, AR13D, AR13HA/HAR, AR14H, WBH-16, WBH-21EF, V303E, V304EH, V305EK, MC94P/S, WM70SLF, WM90PLF, EM120, C30HDZ, and many additional models in these families. When you need a straightforward hardware replacement backed by OEM confidence, EM923343 delivers exactly that.

Key Features

• Genuine OEM Construction — Manufactured to Multiquip's original material and dimensional specifications, delivering the same spring tension and bite as the factory-installed washer.
• Direct Hardware Replacement — 5/16 in bore seats onto existing fastener threads without rework, making it a clean swap on any compatible assembly.
• Broad Cross-Family Fitment — Confirmed for LS, AR, WBH, WTB, V, MC, WM, EM, PRO, C30HD, and MQ600 series models across concrete pumps, mixers, rollers, and power buggies.
• Fastener Integrity Under Vibration — Lock washers prevent fasteners from backing out during operation; a missing or worn washer can lead to loose assemblies, accelerated wear, and unplanned disassembly.
• Electrical and Structural Safety Relevance — Correct torque retention at grounding points, panel mounts, and structural bolts depends on a properly functioning lock washer — using the right part matters on safety-critical connections.

A lock washer is a thin, hardened ring placed under a bolt or nut to resist loosening caused by vibration and dynamic loading. The washer's split or toothed profile bites into the mating surface and fastener face, maintaining clamping force even as equipment vibrates during normal operation. When a lock washer is missing, deformed, or corroded, fasteners can gradually back out, leading to loose components, structural misalignment, or failed electrical connections — any of which can cause equipment malfunction or create a safety hazard on the jobsite.

For fitment verification or ordering assistance, contact DHS Equipment — our team is ready to help you confirm the right part for your machine.

Part Details

Compatibility & Fitment

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.