Wacker Neuson 5000167736 Washer, Lock, 5/16

The Wacker Neuson Washer, Lock, 5/16 is a genuine OEM component designed for a broad range of Wacker Neuson hydronic surface heaters, ground heaters, indirect air heaters, and supporting heating system accessories. As a factory-sourced part, the is manufactured to the exact dimensions and material specifications required by the original equipment, ensuring correct clamping load and vibration resistance across every application it serves. This lock washer fits an extensive range of heating system models including the E3000, E2200, E1100, E5000, HI770XHD, HI1000, HI900DGM, HSH350, HSH650, HSH700G, CUB400, CUB700, and Pureheat series, among others. Keeping a genuine replacement like the on hand ensures heating equipment stays operational through demanding cold-weather work cycles.

Key Features

• Genuine OEM Fastener Integrity — Sourced directly from Wacker Neuson, this lock washer is formed to the exact spring tension and bite angle required to maintain secure fastener preload in heating system assemblies subject to vibration and thermal cycling.
• Direct-Fit 5/16 Sizing — The 5/16 bore dimensions match the original bolt hardware used throughout Wacker Neuson heating equipment, installing without any modification to existing fastener positions.
• Broad Cross-Series Compatibility — A single part number covers hydronic surface heaters (E-series, HSH-series, S3000), indirect air heaters (HI, CUB, Arctic Bear XHD), pump packs (DPP, SPP), and hose handling systems (HHS), simplifying parts inventory for fleet operators.
• Vibration and Thermal Resistance — Lock washers in heating equipment must maintain clamp load under repeated heat expansion and mechanical vibration; a worn or missing lock washer allows fasteners to back out, leading to loose connections and potential system faults.
• Low-Cost Preventive Hardware — Replacing lock washers during scheduled service or component replacement is an inexpensive step that protects surrounding hardware, panels, and fluid connections from loosening over time.

A lock washer is a hardened ring placed under a nut or bolt head to resist loosening caused by vibration, thermal expansion, and contraction. Its spring tension or toothed profile bites into both the fastener and the mating surface, maintaining clamping force even as the assembly experiences repeated heating and cooling cycles. In heating equipment like ground heaters and indirect air heaters, where fuel system components, burner assemblies, and fluid connections are subject to constant thermal movement, a failed or missing lock washer can allow critical fasteners to work loose — potentially causing fluid leaks, loose electrical connections, or structural loosening of panels and brackets.

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.

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