Wacker Neuson 5000203138 Star Washer 8.4

The Wacker Neuson Star Washer 8.4 is a genuine OEM component designed for RD7H-ES, RD7He, and RD7H series tandem rollers. Sourced directly from Wacker Neuson, this part carries the same specification as the original hardware installed at the factory, ensuring a consistent, accurate replacement every time. It is confirmed to fit across multiple RD7 series configurations, including Walk-Behind Roller and Double Drum variants covered under the RD7He and RD7H model lines.

Key Features

• OEM-Matched Tooth Profile — Manufactured to the exact tooth geometry and hardness spec of the original, so the washer locks and holds under the same load conditions as the part it replaces.
• Drop-In Hardware Replacement — Sized at 8.4 mm to match the original fastener stack-up; installs without modification to the surrounding hardware or fastener assembly.
• Broad RD7 Series Coverage — Fits RD7H-ES, RD7He, and RD7H tandem rollers across multiple build configurations, including Walk-Behind Roller and Double Drum North America variants.
• Fastener Retention You Can Count On — A correctly seated star washer maintains clamping force and prevents fastener back-out under vibration — critical on compaction equipment that operates under continuous dynamic load.
• Genuine Wacker Neuson Part — Part number 5000203138 is an authorized OEM replacement, giving you direct traceability to the original equipment specification.

A star washer — also called a lock washer — is a small but essential fastening component that uses serrated or star-shaped teeth to bite into the mating surfaces on either side of a bolted joint. This mechanical bite resists loosening caused by vibration, which is a constant force on compaction equipment like tandem rollers. When a star washer wears flat, loses its teeth, or is missing entirely, the fastener it secures can work loose over time, leading to joint movement, component misalignment, or hardware loss during 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.

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