Multiquip 2101402 Lock Washer 1/4

The Multiquip 2101402 is a genuine OEM Lock Washer 1/4 used across a wide range of Multiquip equipment families. This fastener hardware component is a direct-fit replacement confirmed for models including WM45, WM120, LS300, LS400, LS500, LS600, C30HDG, C30HDZ, C30HDGA, C30HDN, C30HDNI, C30HDNI Zenith, AR13, AR14, V303E, V304EH, V304ER, V304EY, V305EH, V305EK, R2000H, WBH-16, WBH-21, WTB-16, MQ600H, MC44S, EM120, PRO12, and related variants. As a genuine OEM part sourced directly through the Multiquip parts network, the 2101402 matches the original specification used at the factory — so it installs exactly as intended without any guesswork on sizing or threading. DHS Equipment stocks this part for fast fulfillment to keep your equipment back in service.

Key Features

• Genuine OEM Specification — Manufactured to the exact material hardness and dimensional tolerancing required for secure fastener retention across all compatible Multiquip assemblies.
• Drop-In Hardware Replacement — Sized to 1/4" thread engagement, this lock washer seats and locks exactly as the original, requiring no rework to the mounting surface or fastener.
• Broad Cross-Family Compatibility — Confirmed fit across Multiquip mixers (WM45, WM120, EM120, MC44S, PRO12), concrete and Mayco pumps (LS300, LS400, LS500, LS600, C30HD series), rollers (AR13, AR14, V303E, V304, V305, R2000H), power buggies (WBH-16, WBH-21, WTB-16), and trash pumps (MQ600H series).
• Prevents Fastener Loosening Under Vibration — Lock washers are critical in high-vibration equipment environments; a worn or missing washer allows fasteners to back out, leading to component misalignment or mechanical failure.
• Fuel and Fluid System Safety Relevance — Where used in pump and mixer assemblies near fuel or fluid connections, a correctly seated lock washer maintains clamp load and helps prevent leaks at critical joints.

A lock washer is a deceptively simple but mechanically essential fastener component. Its purpose is to apply tension and resistance against the underside of a nut or bolt head, preventing the fastener from rotating loose due to vibration, thermal cycling, or dynamic loading — all of which are constant factors in concrete mixers, pumps, rollers, and power buggies. When a lock washer is missing, worn flat, or substituted with an incorrect size, the fastener it secures can work loose over time, leading to shifted components, fluid leaks, or more serious mechanical damage. Using the correct OEM-spec washer like the Multiquip 2101402 ensures the fastener assembly maintains its designed clamping force throughout the service interval.

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.