Multiquip 0181 Lock Washer 1/4" Medium

The Multiquip 0181 Lock Washer 1/4" Medium is a genuine OEM fastener component used across a wide range of Multiquip equipment families, including ride-on and walk-behind power trowels, roller screeds, masonry saws, trash and centrifugal pumps, concrete vibrators, and Essick mixers. As a direct OEM replacement, part number 0181 meets the same material and dimensional specifications as the original hardware installed at the factory. Compatible models span series including JWN24, STX6H, HTX44, WRS5200, QP3TH, MP1455HP, and many others across the Multiquip portfolio. Sourcing the correct lock washer ensures fastener joints stay properly torqued and secure under the vibration and load cycles these machines generate.

Key Features

• Genuine OEM Hardware Grade — Manufactured to the same material hardness and dimensional tolerances as the original 0181 lock washer, ensuring correct clamping load under vibration.
• Direct-Fit 1/4" Medium Profile — Sized and profiled to seat flush on 1/4" fastener assemblies throughout the machine, requiring no shimming or adaptation at installation.
• Broad Cross-Family Compatibility — A single OEM part number serving ride-on trowels (STX6H, HTX44, JWN24), roller screeds (WRS5200), flat and masonry saws (SP2S20H, MP1455HP), pumps (QP3TH, QP2TK), vibrators (BPX), and Essick mixers (EM120SM, EM900SD).
• Vibration Resistance — The helical lock profile bites into mating surfaces to resist loosening caused by the continuous vibration inherent to compaction, finishing, and pump equipment.
• Verified OEM Part Number — Ordering by Multiquip part number 0181 eliminates the risk of receiving an incorrectly sized washer that could lead to fastener backing out during operation.

A lock washer is a thin, hardened fastener component installed beneath a nut or bolt head to prevent the fastener from loosening due to vibration, torque fluctuation, or thermal cycling. The helical or toothed profile bites into both the fastener and the mating surface, creating mechanical resistance against rotation. On high-vibration equipment such as power trowels, concrete saws, and trash pumps, standard flat washers can allow fasteners to gradually back out over time — a failed or missing lock washer can result in loose assemblies, misalignment, or component separation during operation. Using the correct OEM-specified 0181 washer ensures the joint maintains its designed clamping force throughout the service interval.

For fitment questions or ordering assistance, contact DHS Equipment — our team can confirm compatibility with your specific Multiquip model before you buy.

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.