Wacker Neuson 5000167734 Lock Washer 1/2

The Wacker Neuson is a genuine OEM Lock Washer 1/2 designed for a wide range of Wacker Neuson hydronic surface heaters, indirect air heaters, ground heaters, hose handling systems, and associated pumping equipment. As a direct factory replacement, this washer is sourced to the same specifications as the original hardware used during manufacture. Compatible machines include the E3000, E2200, E1100, E5000, HI770XHD, HI750, HI900, HI1000, HI260, HSH350, HSH650, HSH700, S3000, Pureheat, and APT series, among others. When replacing worn or missing hardware, using the correct OEM fastener ensures structural integrity and proper joint clamping across all supported models.

Key Features

• Genuine OEM Clamping Integrity — Manufactured to Wacker Neuson's original torque and material specifications, ensuring the locking teeth engage and hold correctly under vibration and thermal cycling typical of heating and pumping equipment.
• Direct Drop-In Replacement — Sized at 1/2 inch to match the original fastener position; installs without modification alongside the original bolt or stud hardware.
• Broad Compatibility Across Heater and Pump Families — Fits E-series ground and hydronic surface heaters, HI-series indirect air heaters, HSH hydronic surface heaters, Pureheat units, and APT pump systems.
• Prevents Fastener Loosening Under Load — The locking profile resists back-out caused by vibration and temperature fluctuation, maintaining secure connections in fluid, electrical, and structural assemblies.
• Critical Hardware for Fuel and Fluid System Integrity — Used within heater and pump assemblies where loose fasteners can compromise sealed connections; replacing worn washers at every service interval supports leak-free operation.

A lock washer is a thin, hardened fastener component placed beneath a nut or bolt head to prevent the fastener from loosening under vibration, thermal expansion, or mechanical load. In heating and pumping equipment — where assemblies are regularly exposed to temperature swings and operational vibration — standard flat washers alone cannot maintain consistent clamping force over time. The locking geometry of the 5000167734 bites into both the fastener and the mating surface, resisting rotational back-out and preserving joint integrity. When a lock washer is worn flat, cracked, or missing entirely, fasteners can work loose, leading to fluid leaks, electrical connection failures, or structural looseness that accelerates wear on surrounding components.

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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