The Wacker Neuson Flat Washer is a genuine OEM component designed for the HSH350 and HP252 hydronic surface heaters. As a factory-sourced part, it meets the original dimensional and material specifications set by Wacker Neuson, ensuring it seats and functions exactly as the original did. This washer is confirmed to fit the HSH350 and HP252 series, making it a straightforward, confidence-inspiring choice when servicing these machines.
Key Features
- Genuine OEM Material Consistency — Manufactured to Wacker Neuson's original hardness and surface-finish specifications, so load distribution across fastened joints stays within design tolerances.
- Drop-In Replacement — Matches the original bore diameter, outer diameter, and thickness, so it installs directly onto the existing fastener without rework or shimming.
- Confirmed Fitment for HSH350 and HP252 — Verified for the HSH350 hydronic surface heater (including 50 Hz variants) and the HP252, covering the core machines in this product family.
- Maintains Clamping Integrity — A correctly sized flat washer spreads fastener load evenly across the mating surface; a worn or undersized washer can allow fasteners to loosen under thermal cycling and vibration, compromising joint security.
- Fuel and Fluid System Safety — Where used on connections within the hydronic circuit, proper washer seating supports leak-free joints in a system that handles heated fluid under pressure.
A flat washer is a thin, disc-shaped hardware component placed under a bolt head or nut to distribute clamping force over a larger surface area. In hydronic surface heaters like the HSH350 and HP252, washers appear throughout the assembly — on fluid circuit connections, panel fasteners, and component mounting points — where they protect softer mating surfaces and help maintain consistent clamping loads through repeated heat-and-cool cycles. When a washer becomes deformed, corroded, or lost during service, replacing it with the correct OEM part ensures joint integrity is fully restored rather than approximated.
Part Details
| Part Number | 5000173621 |
|---|---|
| Old Part Number | 0173621 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flat Washer |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Hydronic Surface Heater | HSH350 | 5000620254, 5200001677 |
| HP252 | HP252 | 5000620249 |
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.
