The Wacker Neuson is a genuine OEM M6 Locking Washer designed for the HI-Series indirect-fired air heaters, HSH-Series hydronic surface heaters, and E-Series ground and hydronic heaters. As a factory-sourced component, part is manufactured to the same specifications as the original hardware used on the production line, ensuring consistent torque retention and secure fastener performance across all covered configurations. This washer fits an extensive range of models including the HI 770 XHD, HI 750, HI 900, HI 1000, HSH 380, and E1250, E2200, and E3000 series units in diesel, natural gas, and propane variants. Verifying your model number before ordering confirms the correct fit for your specific machine.
Key Features
- Genuine OEM Locking Retention — Factory-sourced M6 hardware engineered to maintain clamping load under vibration and thermal cycling typical of heater operation.
- Direct Drop-In Hardware — Matches the original M6 thread pitch and outside diameter, seating correctly against fastener and mating surface without modification to surrounding components.
- Broad Heater Family Coverage — Compatible with HI 770 XHD, HI 750, HI 900, HI 1000, HSH 380, E1250, E2200, and E3000 series heaters in diesel, natural gas, and propane configurations.
- Prevents Fastener Loosening — The locking profile bites into the fastener and mating surface, resisting self-loosening caused by engine vibration and repeated heat cycles that can lead to structural or panel fastener failure.
- Fuel System and Panel Safety Relevance — On indirect-fired heaters and hydronic systems, loose fasteners at fuel, burner, or enclosure attachment points can compromise safe operation; correct locking hardware is a basic but critical safeguard.
A locking washer is a hardened metal fastener component placed between a nut or bolt head and the mating surface to prevent the fastener from backing out under load. On indirect-fired air heaters and hydronic surface heaters, vibration from burner operation, transport, and fan assemblies can gradually loosen standard hardware — a locking washer counters this by applying continuous spring or toothed resistance against rotation. When this component is missing, damaged, or substituted with an incorrect size, fasteners may work loose over time, potentially affecting enclosure integrity, component mounting security, and in fuel-adjacent applications, safe heater operation.
Part Details
| Part Number | 5000173965 |
|---|---|
| Old Part Number | 0173965 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | M6 Locking Washer |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 770 XHD Indirect Air Heater, Diesel, 2x12 | Arctic Bear XHD | 5000620676 |
| HI 770 XHD Indirect Air Heater, Diesel, 1x16 | HI770XHD | 5000620183, 5200003814, 5200004934, 5100049894 |
| E2200 GROUND HEATER, W/ LIFT BAIL | E2200 | 5000620215, 5000620176, 5000620216, 5000620226, 5100017448, 5100017449 |
| E1250S | E1250S | 5200012355, 5200012354 |
| HI770XHD Indirect Heater | Arctic Bear XHD NS | 5000620690 |
| E3000 ES Hydronic Surface Heater | E3000ES | 5000620968, 5000620967 |
| E12540B | E1250B | 5200012353, 5200007613 |
| HI750 DGM HEATER-INDIRECT | HI750GM | 5000620859, 5000620930 |
| Mobile Indirect Fired Air Heat er, Diesel | HI750D | 5000620856, 5000620923, 5000620924 |
| HI 750GM HD-Mobile Indirect Ai r Heater-Surge, -40 | HI750GMHD | 5000620969 |
| HI750G HEATER-INDIRECT | HI750G | 5000620857, 5000620928, 5000620929 |
| HSH380s | HSH 380S | 5100054643 |
| E 1250P Hydronic Heater, Premium, Diesel | E1250P | 5200012357, 5200012356 |
| HSH380S-Diesel, with Generator | HSH380S | 5200012371, 5200012370 |
| E3000 ES Ground Heater, 3kW Gen | E3000 | 5100017801 |
| HI1000 Indirect Air Heater, DGM, Electric Break | HI1000DGM | 5200011234, 5200011235, 5100049275, 5100049276 |
| HSH380B-Diesel, without generator | HSH380B | 5200012359, 5200007614 |
| HX30 Heat Exhanger, 230 V | HX30 | 5000620913 |
| HI1000 | HI1000 | 5100049274 |
| HI900 Heater-DGM,Srg,-40 | HI900DGM | 5200014221, 5200014222, 5200014165, 5200014166 |
| HI 900D Heater-Indirect | HI900D | 5200014158, 5200014159, 5200014160 |
| Skid Indirect Air Heaters Natu ral Gas | HI900G | 5200014161 |
| HI 900G Heater-Indirect,3x16 | HI900 G | 5200014163, 5200014164 |
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.
