Multiquip 21893 Fast Lead Screw

The Multiquip 21893 Fast Lead Screw is a genuine OEM component designed for Whiteman and International ride-on and walk-behind power trowel series, including HTX44Y4, HTX44Y5, STXD6i, HTXD6i, MD80, and HHX-series machines, as well as a broad range of walk-behind trowel models including the B46, HDA-Series, and J-Series units. As a direct OEM replacement, part 21893 is manufactured to the same specifications as the original hardware, ensuring a drop-in fit with no guesswork on thread engagement or seating depth. This screw is a high-demand service item across multiple trowel families, making it a smart stocking part for contractors and rental fleets running Multiquip equipment.

Key Features

• Genuine OEM Thread Specification — Fast lead thread form matches the original production part exactly, ensuring correct engagement depth and clamping force in the trowel assembly.
• Direct Drop-In Replacement — Installs in place of the original hardware with no modification to surrounding components or mating surfaces.
• Broad Trowel Family Coverage — Fits HTX, STX, MD80, HHX, B46, HDA, and J-Series trowels, covering both ride-on hydrostatic and walk-behind models from the Multiquip portfolio.
• Maintains Blade Pitch Adjustment Integrity — A correctly fitted fast lead screw allows smooth, accurate blade pitch changes; worn or cross-threaded hardware causes imprecise pitch control and uneven slab finishing.
• OEM Part Number Confidence — Sourced directly through Multiquip's authorized parts channel, so part number 21893 is traceable and verified against current trowel model bills of material.

A fast lead screw is a threaded fastener with a steeper-than-standard thread helix angle, allowing it to translate rotational input into linear movement more quickly than a conventional screw. In a power trowel, this type of hardware is used in pitch adjustment mechanisms where the operator needs quick, responsive changes to blade angle during finishing passes. When this screw becomes worn, stripped, or damaged, the pitch adjustment can become loose, inconsistent, or unresponsive — directly affecting the quality and flatness of the concrete surface being finished. Replacing it promptly with the correct OEM part restores full adjustment control and protects the precision of the finishing operation.

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.