Multiquip 10019 Lock Nut 10-32

The Multiquip 10019 is a genuine OEM Lock Nut 10-32 designed for a wide range of Multiquip and Whiteman equipment including ride-on power trowels, walk-behind trowels, light towers, trash pumps, water trailers, and roller screeds. As a direct OEM replacement, this lock nut meets the exact thread specification and retention standard required by Multiquip for the models it serves. Confirmed fitment includes HTN28K, HTN27K, HTX6H, HTX44Y5, HTX44K5, STX55Y6, STX55J6, STX6H, MD105, MD80, LD60, LD6, JWN24HTCSL, HHN34TVD, HHN31V, J36E2, LT6K, LT6KV, QP4TKT, MQ62TK, MQ62TDD, WRS5200, and related variants. Sourcing the correct OEM part number ensures the fastener performs as engineered and does not back out under vibration or load cycling common on concrete finishing and pumping equipment.

Key Features

• Genuine OEM Thread Integrity — Manufactured to the exact 10-32 thread specification Multiquip engineers to retain torque under sustained vibration loads on trowels, pumps, and screeds.
• Drop-In Hardware Replacement — Matches the original fastener profile for straightforward installation without rework or thread chasing on existing hardware points.
• Broad Cross-Series Fitment — Verified for HTN, HTX, STX, MD, LD, JWN, HHN ride-on trowel series, WRS roller screeds, LT6K light towers, QP and MQ trash pumps, and WT water trailers.
• Vibration-Resistant Locking Design — The locking feature prevents gradual loosening on equipment that generates continuous vibration, protecting structural and mechanical connection points.
• Fastener Failure Prevention — A missing or worn lock nut at a critical connection can allow components to shift or detach during operation; replacing with the correct OEM part restores the designed retention load.

A lock nut is a threaded fastener engineered to resist loosening when exposed to vibration, dynamic loads, or torque cycling. Unlike a standard hex nut, a lock nut incorporates a locking mechanism — typically a nylon insert, a distorted thread, or a prevailing-torque design — that maintains clamping force even as the surrounding assembly flexes or vibrates. On concrete finishing equipment, pumps, and light towers, fasteners at panel mounts, guard attachments, and mechanical linkages are subjected to constant vibration that can work a standard nut loose over time. When a lock nut fails or goes missing, the connected component can shift, rattle, or separate, leading to accelerated wear on adjoining parts or a loss of structural integrity at that mounting point. Using the correct OEM-specified 10019 Lock Nut 10-32 ensures the fastener's locking element engages at the torque value the assembly was designed around.

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.