Multiquip 21986 Fast Lead Stainless Washer

The Multiquip 21986 is a genuine OEM Fast Lead Stainless Washer designed for a wide range of Whiteman and Multiquip walk-behind and ride-on power trowels. As a direct OEM replacement, part 21986 is manufactured to the same standards as the original hardware, ensuring a consistent fit across the HDA Series, J36-M30 Series, B46, HTX44Y4, HTX44Y5, STXD6i, HTXD6i, MD80, and many other models in the trowel lineup. Stainless steel construction gives this washer lasting resistance to corrosion and wear in the demanding concrete finishing environment. Whether you are servicing a walk-behind float or a hydrostatic ride-on machine, Multiquip 21986 keeps your hardware assembly tight and performing as intended.

Key Features

• Stainless Steel Construction — Corrosion-resistant material stands up to moisture, slurry, and the harsh conditions of active concrete finishing work.
• Genuine OEM Part — Sourced directly from Multiquip, this washer matches the original specification for thread engagement and seating surface, so hardware torques correctly without distortion.
• Broad Trowel Compatibility — Fits HDA Series, J36-M30 Series, B46, JH90C, JH55C, JS60C, BS90C, BH11C, BH90C, HTX44Y4, HTX44Y5, STXD6i, HTXD6i, MD80, HHXDF4-DF5, HHXD5, HHXG5, and additional models.
• Drop-In Hardware Replacement — Dimensionally identical to the factory washer, so it seats and installs without any modification to existing fastener assemblies.
• Prevents Fastener Loosening — A properly seated washer distributes clamping load evenly across the joint; a worn or missing washer allows fasteners to back out under vibration, leading to blade pitch drift and unsafe operating conditions.
• Fastener Safety in High-Vibration Applications — Power trowels operate under continuous vibration; using the correct stainless washer maintains joint integrity and helps prevent hardware failure that could affect blade control.

A fast lead washer is a hardened or precision-formed washer used in fastener assemblies where vibration is a constant factor. In a power trowel, the rotating blade assembly generates significant vibration through the gearbox and spider arms, and every fastener in that system must maintain its clamp load through hours of operation. This washer seats under the fastener head or nut to spread the load across a wider surface area, preventing the fastener from pulling through or loosening under vibration. When a washer is missing, deformed, or corroded, the clamping force at that joint drops, allowing hardware to shift — which can alter blade pitch consistency and lead to premature wear on surrounding components.

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.