The Wacker Neuson Lock Nut M4 is a genuine OEM Lock Nut M4 designed for the G 7AI and GS12Ai portable generator series. As a direct factory replacement, this fastener is manufactured to the same specification as the original hardware fitted at the factory, ensuring correct thread engagement and clamping force throughout its service life. Wacker Neuson OEM status means the is the exact part called out in the service documentation for these generators, so you can fit it with confidence.
Key Features
- Genuine OEM Thread Integrity — Manufactured to the precise M4 thread pitch and locking torque spec required for these generators, ensuring the fastener holds under vibration without stripping or backing off.
- Direct Hardware Replacement — Matches the original fastener profile exactly, dropping straight into existing threaded positions without any modification to mating components.
- Confirmed Generator Fitment — Verified for the Wacker Neuson G 7AI and GS12Ai 50Hz portable generator series.
- Vibration-Resistant Locking Design — The locking feature prevents loosening caused by the continuous vibration inherent in generator operation, protecting critical assemblies from fastener failure.
- Electrical Safety Assurance — On generator equipment, loose or incorrect fasteners on panel and component mounting points can compromise grounding continuity and enclosure integrity; using the correct OEM lock nut maintains those connections as designed.
A lock nut uses a built-in locking mechanism — typically a nylon insert, a prevailing-torque profile, or a distorted thread — to resist loosening under dynamic loads and vibration. On portable generators like the G 7AI and GS12Ai, fasteners are subjected to constant engine vibration and thermal cycling, both of which can cause standard nuts to back off over time. A failed or missing lock nut can allow components to shift, creating mechanical noise, misalignment, or — in electrical enclosures — unsafe contact between live parts and adjacent hardware. Replacing a worn or missing lock nut with the correct OEM part restores the secure, vibration-resistant connection the machine was built with.
Part Details
| Part Number | 5000156002 |
|---|---|
| Old Part Number | 0156002 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lock Nut M4 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| G 7AI | G7AI | 5000009104 |
| 50Hz Portable Generator 12 kVA | GS12Ai | 5000009108 |
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.
