The Wacker Neuson M4 Washer is a genuine OEM component designed for PSC42203 and PSC43703 series submersible pumps. Sourced directly from Wacker Neuson, this washer is manufactured to the same specifications as the original hardware fitted at the factory, ensuring a correct, consistent installation every time. It is a direct-fit replacement for the PSC42203 and PSC43703 models, so no modification or sizing guesswork is needed. Keep a spare on hand — small fastener hardware like this is a common service item during pump maintenance and rebuild work.
Key Features
- Genuine OEM Hardware Spec: — Manufactured to the exact M4 diameter and thickness tolerances specified for Wacker Neuson submersible pump assemblies, preventing fastener loosening or surface damage under load.
- Drop-In Fitment: — Matches the original M4 hardware position exactly on PSC42203 and PSC43703 pump models, slotting into place without reworking the mounting surface.
- Confirmed Submersible Pump Compatibility: — Verified fitment across the PSC42203 and PSC43703 Wacker Neuson submersible pump models.
- Proper Load Distribution: — Correctly sized washers spread clamping force evenly across fastener contact points, protecting pump housing surfaces and maintaining secure assembly integrity during continuous operation.
- Essential Service Stock: — M4 washers are frequently replaced during routine maintenance and seal or impeller service; having the correct OEM part on hand keeps rebuilds moving without a trip back to the supplier.
A washer functions as a load-distributing interface between a fastener — such as a bolt or screw — and the surface it clamps against. In submersible pump assemblies, where components are exposed to water, pressure, and vibration, correctly spec'd washers prevent fastener pull-through, protect sealing surfaces, and maintain consistent clamping force over time. When a washer is undersized, corroded, or missing, fasteners can work loose or damage the housing, leading to leaks or mechanical failure at the joint.
Part Details
| Part Number | 5000178384 |
|---|---|
| Old Part Number | 0178384 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | M4 Washer |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 3~Submersible Pumps | PSC42203 | 5000620469 |
| 3~Submersible Pumps | PSC43703 | 5000620470 |
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.
