Wacker Neuson 5000203139 Serrated A8.4 Washer

The Wacker Neuson is a genuine OEM Serrated A8.4 Washer designed for the RD7H and RD7He series tandem rollers. Sourced directly from Wacker Neuson, this part carries the same specifications as the component originally installed at the factory, so you can fit it with complete confidence. It is compatible across a broad range of RD7H and RD7He models, including both North American and EU configurations of the RD7 and RD7H tandem rollers. When you need an exact replacement, the part number is the correct reference for this application.

Key Features

• Genuine OEM Serration Profile — Manufactured to Wacker Neuson's original tooth geometry, ensuring the washer bites and locks as intended under load and vibration.
• Drop-In Replacement — Matches the original A8.4 bore size and outer diameter exactly, so it seats flush with no rework or shimming required.
• Broad RD7 Series Fitment — Compatible with RD7H and RD7He tandem rollers across multiple production runs, covering both North American and EU variants.
• Vibration-Resistant Locking Action — The serrated contact face grips mating surfaces under the high-vibration conditions typical of compaction equipment, maintaining clamp load over extended operation.
• Genuine Wacker Neuson Part — Backed by Wacker Neuson's OEM quality assurance, giving you the same material grade and hardness as the part it replaces.

A serrated washer is a fastening component that sits between a bolt head or nut and the mating surface, using raised teeth on its contact face to resist loosening caused by vibration and dynamic loads. On compaction equipment like tandem rollers, where continuous vibration is a core part of normal operation, serrated washers play a critical role in keeping bolted assemblies secure. A worn or missing serrated washer can allow fasteners to back out gradually, leading to loose assemblies, accelerated wear on surrounding components, and potential fastener failure in service.

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.