Wacker Neuson 5000167888 Lock Washer

The Wacker Neuson Lock Washer is a genuine OEM component designed for the HSH hydronic surface heater series, E-Series ground heaters, HHS hose handling systems, and associated climate and heating equipment. Sourced directly from Wacker Neuson, this OEM part meets the original engineering specification for every application it serves. Compatible fitment spans a broad range of hydronic heating and indirect air heating equipment — including the HSH350, HSH650, HSH700, E700M, E1100, E2200, E5000, HHS700M, HHS1101, HHS1251, HHS1701, HHS2200, HHS2202, HHS2502, HHS3000, HHS3002, HHS3004, Arctic Bear HD, CH5000, and HIF600. Confirm your model number before ordering to ensure an accurate match.

Key Features

• Genuine OEM Retention Integrity — Manufactured to the original torque-retention specification, ensuring the washer grips and holds under the vibration and thermal cycling typical of heating equipment operation.
• Direct Drop-In Replacement — Matches the original fastener stack exactly, so installation requires no modification to existing hardware or mating components.
• Broad Cross-Series Compatibility — Fits HSH hydronic surface heaters, E-Series ground heaters, HHS hose handling systems, Arctic Bear HD indirect air heaters, and the CH5000 cross heater — a single part number covering a wide equipment fleet.
• Prevents Fastener Back-Out — A correctly functioning lock washer keeps critical fasteners from loosening due to vibration or temperature swings; a missing or flattened washer can lead to loose connections and unplanned service calls.
• Supports Electrical and Fluid System Safety — In heating equipment where fastener security directly affects panel integrity and fluid-circuit connections, using the correct OEM-spec lock washer is a straightforward way to maintain safe, code-compliant assembly.

A lock washer is a hardened fastener component placed beneath a nut or bolt head to resist loosening caused by vibration, thermal expansion, and contraction cycles. In hydronic heaters, ground heaters, and hose handling systems — which experience repeated heat-up and cool-down cycles during normal operation — fasteners are particularly susceptible to backing out over time. The lock washer bites into both the mating surface and the fastener, creating mechanical resistance that keeps the connection tight. When a lock washer is worn flat, cracked, or missing entirely, fasteners can work loose, potentially allowing panel covers, fluid fittings, or electrical connections to shift — making timely replacement with the correct OEM part an important part of routine maintenance.

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.