The Wacker Neuson Lock Washer M6 External Star is a genuine OEM fastener component designed for the GP3800A, GP4000, GP5600A, GPS5600A, GP6600A, and GPS6600A series portable generators. As a direct source part, the meets Wacker Neuson's original engineering specifications, ensuring it seats and functions exactly as intended on the production line. This lock washer services an extensive range of GP-series generator configurations, including standard, wheel kit, electric start, GFI, CARB, EPA, CSA, and CAN variants across multiple build codes.
Key Features
- Genuine OEM Fastener Integrity — Manufactured to Wacker Neuson's original torque-retention specification, ensuring the external star teeth bite correctly into mating surfaces to prevent bolt loosening under vibration.
- External Star Profile — The external star tooth geometry maximizes grip on the fastener head and bearing surface, providing superior anti-rotation performance compared to plain or internal-tooth alternatives.
- M6 Thread Compatibility — Sized precisely for M6 fasteners, the 5000170941 drops directly into position without modification to hardware or surrounding components.
- Broad GP-Series Coverage — Fits GP3800A, GP4000, GP5600A, GPS5600A, GP6600A, and GPS6600A generators across EPA, CARB, CSA, GFI, standard, and wheel-kit configurations — one part number covers a wide service range.
- Vibration Resistance Where It Counts — Generators produce continuous mechanical vibration during operation; a failed or missing lock washer allows fasteners to back out, risking component loosening and potential service interruptions.
A lock washer is a thin, hardened fastener insert placed under a bolt or nut to prevent it from backing out due to vibration or dynamic loads. On portable generators like the GP-series, engine vibration is constant during operation, which places ongoing stress on every threaded connection throughout the machine. The external star design works by embedding its serrated teeth into both the fastener head and the clamped surface as the bolt is tightened, creating a mechanical lock that resists rotation. When a lock washer becomes deformed, corroded, or missing, fasteners can gradually loosen, leading to misaligned components, fluid leaks, or electrical connection failures depending on their location in the machine.
Part Details
| Part Number | 5000170941 |
|---|---|
| Old Part Number | 0170941 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lock Washer M6 External Star |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Premium Portable Generator | GP5600A | 5000620094, 5000620095, 5000620381, 5000620382, 5000620326, 5000620327, 5000620984, 5000620979, 5000620980, 5000620042, 5000620043, 5000620091, 5000620092, 5000620011, 5000620012 |
| GPS5600A,CAN GFI | GPS5600A | 5000620096, 5000620383, 5000620328, 5000620981, 5000620982, 5000620044, 5000620093, 5000620013 |
| GP6600A GENERATOR,CAN GFI | GP6600A | 5000620100, 5000620101, 5000620384, 5000620329, 5000620330, 5000620045, 5000620046, 5000620097, 5000620098, 5000620014, 5000620015 |
| GPS6600A GENERATOR,CAN GFI | GPS6600A | 5000620102, 5000620386, 5000620331, 5000620047, 5000620099, 5000620016 |
| Portable Generator | GP3800A | 5000620104, 5000620379, 5000620485, 5000620342, 5000620484, 5000620041, 5000620103, 5000620010 |
| Premium Portable Generator | GP6600 | 5000620385, 5000620989, 5000620990, 5000620985, 5000620986 |
| Premium Portable Generator | GP4000 | 5000620090, 5000620380, 5000620977, 5000620978, 5000620089 |
| GPS6600A Generator, EPA | GPS6600 | 5000620987, 5000620988 |
| GP3800A Generator, EPA w/Wheel Kit | GP3800 | 5000620976, 5000620974, 5000620975, 5100031174 |
| GP5600A Generator, EPA w/Wheel Kit | GP5600 | 5000620983 |
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.
