Wacker Neuson 5000021465 Lock Washer

The Wacker Neuson is a genuine OEM Lock Washer designed for a broad range of Wacker Neuson compaction equipment, including the BS50-2 and BS50-4s vibratory rammer series, BPU and DPU reversible vibratory plate compactor lines, and RD7 tandem roller models. As a direct OEM replacement, this lock washer is manufactured to the same specification as the original hardware installed at the factory. The is confirmed across an extensive fitment list spanning two-cycle, four-cycle, and oil-injected rammer variants, multiple DPU and BPU plate compactor configurations, and select floor saw models, making it a highly versatile service part to keep on hand. When replacing worn or damaged fastener hardware, sourcing the correct genuine OEM part ensures proper torque retention and structural integrity throughout the assembly.

Key Features

• Genuine OEM Torque Retention: — Manufactured to the original Wacker Neuson hardness and dimensional spec, ensuring the washer maintains correct clamp load and resists loosening under vibration — critical in compaction equipment subject to constant cyclical stress.
• Drop-In Hardware Replacement: — Matches the original hole diameter, thickness, and locking geometry of the factory-installed washer, so it seats and torques correctly without rework or shimming.
• Broad Cross-Family Fitment: — A single part number covers BS50-2 and BS50-4s rammers, BPU 2540A through BPU 5545A gasoline reversible plate compactors, DPU 2540H through DPU 6555 series diesel reversible plate compactors, RD7 tandem rollers, and select BFS floor saw models.
• Vibration-Resistant Locking Function: — The locking geometry prevents fastener back-out in high-vibration assemblies. A failed or missing lock washer can allow critical bolted joints to work loose during operation, leading to component misalignment or fastener loss.
• Fastener Safety Compliance: — In compaction and rotating-mass equipment, loose fasteners caused by missing or degraded lock washers represent a genuine safety hazard. Using the correct OEM hardware maintains the integrity of bolted assemblies and supports safe machine operation.

A lock washer is a hardened fastener component installed beneath a bolt or nut to prevent the fastener from rotating loose under vibration or dynamic load. In vibratory compaction equipment — rammers, plate compactors, and tandem rollers — virtually every major assembly is subject to continuous high-frequency vibration, which places extreme demands on threaded joints. When a lock washer wears out, deforms, or goes missing, the fastener it supports can back out progressively during operation, potentially causing component loosening, misalignment, or mechanical failure. Replacing a damaged or missing lock washer with the correct OEM part restores the fastener joint to its designed specification and prevents more costly repairs down the line.

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.