Multiquip 0161 Lock Washer 3/8

The Multiquip 0161 is a genuine OEM Lock Washer 3/8 designed for a wide range of Multiquip, Whiteman, and Essick equipment including ride-on and walk-behind power trowels, trash pumps, centrifugal pumps, concrete saws, masonry saws, concrete vibrators, generators, water trailers, vibratory screeds, and mortar mixers. This OEM-sourced fastener component is built to the same specification as the original hardware installed at the factory, ensuring a direct, dependable fit across the many machine families it serves. Confirmed fitment includes models such as HTX44Y5, HTX44K5, STX55Y6, STX55J6, JWN24HTCSL, HHN31V, HHN34TVD, QP3TZ, QP3TS, QP4TKT, QPT405SLT, SP1G, SP118, DAC7000SS, DAC7000SSA, DAC7000SSW, EM120SM, EM900SD, BPX, LT6K, and many others. Sourced directly through DHS Equipment, the Multiquip 0161 Lock Washer 3/8 is a stocked OEM replacement ready to support maintenance and repair across your fleet.

Key Features

• Genuine OEM Hardened Steel Construction — Manufactured to Multiquip's original material and hardness specification, delivering the clamping force retention expected of a fastener in demanding equipment applications.
• Direct Hardware Replacement — Matches the original 3/8 bolt and fastener pattern exactly, dropping into place without any modification to existing hardware or fastener configurations.
• Broad Cross-Family Fitment — Confirmed for HTX, STX, JWN, HHN, QP, SP, DAC, EM, BPX, LT, WT, WSHE, and CA series equipment — one part number covering multiple machine lines.
• Maintains Fastener Joint Integrity — A correctly functioning lock washer prevents loosening under vibration and load cycling; a worn or missing unit allows fasteners to back out, risking mechanical failure or structural movement during operation.
• Vibration-Critical Application — Many fitment machines generate significant vibration during normal operation, making the lock washer's bite and spring tension essential to keeping assemblies secure throughout a full work cycle.

A lock washer is a hardened fastener insert placed between a bolt head or nut and the mating surface to resist loosening caused by vibration, dynamic loads, and thermal cycling. The washer's split or serrated design bites into both the fastener and the substrate, creating mechanical resistance that prevents rotation and backing out. On high-vibration equipment such as plate compactors, power trowels, concrete saws, and pumps, a compromised or missing lock washer can allow critical fasteners to loosen progressively, leading to component misalignment, accelerated wear, or an unsafe working condition. Replacing a worn or damaged lock washer with a correctly rated OEM unit restores the original clamping integrity of the joint.

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.