The Wacker Neuson is a genuine OEM Washer 5/8 GR8 Flat designed for the APT4S, APT6T, APT8T, and APT8S pump series, including skid-mounted, surge brake, electric brake, and cold-weather configurations, as well as the 72-inch and 84-inch Angle Broom attachments. As a direct Wacker Neuson OEM component, part is manufactured to the exact material grade and dimensional specification required for proper clamping load and fastener integrity across these machines. This grade 8 flat washer provides the hardened bearing surface needed to distribute fastener load correctly, ensuring connections stay tight through the vibration and stress of pump and attachment operation. Verify your model number against the fitment list to confirm compatibility before ordering.
Key Features
- Grade 8 Hardness for High-Load Applications — The GR8 rating means this washer is heat-treated to handle the clamping forces and shear stress found in pump skid frames, trailer mounts, and broom attachment hardware without deforming or relaxing under load.
- Genuine OEM Dimensional Accuracy — Sourced directly from Wacker Neuson, this washer matches the exact 5/8-inch bore, outer diameter, and thickness specified for these assemblies, so it seats flush and distributes load evenly across the mating surface.
- Broad APT Series Compatibility — Fits the full APT4S, APT4T, APT6S, APT6T, APT8S, and APT8T pump families — including surge brake, electric brake, cold-weather, and skid-mounted variants — plus 72-inch and 84-inch Angle Broom attachments.
- Protects Fastener Joints Against Vibration Loosening — A correctly rated flat washer prevents fastener pull-through and surface damage at bolt points, maintaining joint integrity on equipment that operates under continuous vibration or frequent towing cycles.
- Genuine OEM Traceability — Carries the Wacker Neuson OEM part number 5000175391, so you can cross-reference against your parts manual with confidence and avoid substituting an undersized or softer-grade washer that could compromise the connection.
A flat washer serves as a hardened bearing surface placed under a bolt head or nut to spread the clamping load over a wider area of the mating material, preventing the fastener from pulling through or crushing the surface it bears against. In grade 8 specification, the washer is heat-treated to a higher tensile strength than standard hardware-grade washers, making it suited for structural and load-bearing fastener joints where connection integrity is critical. When a washer of the wrong grade or diameter is used, the joint can lose preload over time — especially under vibration — leading to loosened fasteners, damaged mounting surfaces, and potential structural failure at the connection point.
Part Details
| Part Number | 5000175391 |
|---|---|
| Old Part Number | 0175391 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Washer 5/8 GR8 Flat |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT6S Pump w/Skid | APT6S | 5200018982 |
| APT6T Pump, Surge Brake | APT6T | 5200019646, 5200019647 |
| APT6T Pump, Surge Brake, Cold Weather | APT6T CW | 5200019794, 5200019795 |
| Angle Broom-72" | Angle Broom-72" | 5000173341 |
| APT4S Pump w/Skid | APT4S | 5200018977 |
| APT8S Pump w/Skid | APT8S | 5200018987 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| APT8T Pump, Surge Brake | APT8T | 5200019648, 5200019649 |
| APT4T Pump, Surge Brake, Cold Weather | APT4T CW | 5200019792, 5200019793 |
| APT8T Pump, Surge Brake, Cold Weather | APT8T CW | 5200019796, 5200019797 |
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
| APT6S Pump w/Skid, Cold Weather | APT6S CW | 5200019799 |
| APT8S Pump w/Skid, Cold Weather | APT8S CW | 5200019800 |
| Angle Broom-84" | Angle Broom-84" | 5200019635 |
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.
