The Wacker Neuson is a genuine OEM Keps Zinc Plated Nut 11902 designed for the HI 770 XHD series indirect air heaters. As a direct OEM replacement, part is sourced and specified by Wacker Neuson to match the original hardware used on the HI 770 XHD platform, including diesel configurations with single and dual duct outputs. This fastener fits across the Arctic Bear XHD and HI770XHD machine families, covering a wide range of build variants within the HI 770 XHD lineup.
Key Features
- Zinc-Plated Corrosion Resistance — The zinc plating provides a protective barrier against rust and oxidation, keeping the fastener intact in the demanding, moisture-exposed environments where indirect air heaters operate.
- Keps Nut Design for Secure Retention — The integrated free-spinning lock washer on a Keps nut bites into the mating surface on installation, resisting loosening from vibration without requiring a separate lock washer.
- Genuine OEM Specification — Sourced directly from Wacker Neuson, this nut meets the exact thread pitch, material grade, and dimensional spec of the original hardware — no substitution guesswork.
- Broad HI 770 XHD Fitment — Compatible across Arctic Bear XHD, Arctic Bear XHD NS, and HI770XHD variants, covering diesel indirect heater builds in 2x12, 1x16, and 1x20 duct configurations.
- Structural Integrity Under Thermal Cycling — Indirect air heaters run through repeated heat and cool cycles; a properly rated fastener like the 5200005441 maintains clamp load and prevents panel or component loosening over time.
A Keps nut — also called a K-nut or washer nut — is a standard hex nut with a free-spinning external tooth lock washer permanently attached to its bearing face. During tightening, the serrated washer bites into the clamped surface and the nut body, creating mechanical resistance to rotational loosening caused by vibration or thermal expansion. On indirect-fired air heaters like the HI 770 XHD, where panels, housings, and heat exchanger components are subject to constant vibration from the burner fan and engine, maintaining secure fastener engagement is critical to safe operation and structural integrity. A worn, stripped, or missing Keps nut can allow panels to work loose, creating gaps that reduce heating efficiency or expose internal components.
Part Details
| Part Number | 5200005441 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Keps Zinc Plated Nut 11902 |
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 |
| HI770XHD Indirect Heater | Arctic Bear XHD NS | 5000620690 |
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.
