The Wacker Neuson is a genuine OEM Flat Square Neck Bolt, M8 X 40 designed for Wacker Neuson G, GS, and GPS series portable generators. As a direct factory replacement, is manufactured to the same specifications as the original hardware installed at the factory, ensuring a consistent, secure fit in the exact mounting locations it was engineered for. This bolt is compatible across a broad range of Wacker Neuson generator models including the GPS9700, GS8500, GS12Ai, G3.3A, G3.7A, G4.6A, G5.6A, and G7AI series, among others. Ordering the correct OEM part number eliminates guesswork and keeps your generator properly assembled and field-ready.
Key Features
- OEM-Grade Hardware Integrity — Manufactured to Wacker Neuson's original torque and thread specifications for the M8 X 40 fastener profile, so clamping force and holding strength match what came off the production line.
- Square Neck Anti-Rotation Design — The flat square neck seats flush into the mating recess during installation, preventing the bolt from spinning when the nut is tightened — no secondary tooling needed to hold the head.
- Broad Generator Family Coverage — Fits a wide range of Wacker Neuson portable generator series including G, GS, and GPS models across multiple kVA ratings and 50Hz/60Hz configurations.
- Structural Fastener Replacement — Worn, stripped, or missing structural bolts compromise panel alignment and component retention; replacing with part 5000159003 restores the correct clamping load at the affected joint.
- Genuine Wacker Neuson OEM Part — Sourced directly from Wacker Neuson, this fastener carries the same part number (5000159003) used in the factory assembly, making cross-referencing with your service manual straightforward.
A flat square neck bolt is a specialized fastener used in assemblies where the bolt head must be held stationary during tightening. The square neck section beneath the head locks into a corresponding square hole or recess in the mating component, preventing rotation so that torque is transferred directly to the nut rather than spinning the bolt. In portable generator applications, these fasteners are commonly used to secure panels, frames, and structural brackets where access to the bolt head is limited. When this type of bolt becomes stripped, corroded, or is lost during service, the joint it secures can work loose under vibration — leading to misaligned covers, rattling components, or potential damage to surrounding hardware.
Part Details
| Part Number | 5000159003 |
|---|---|
| Old Part Number | 0159003 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flat Square Neck Bolt, M8 X 40 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| G 7AI | G7AI | 5000009104 |
| Portable Generator with Electr ic Start | GPS9700 | 5000008287, 5000620264, 5200005042, 5000620973, 5100036768 |
| Portable Generator with Electr ic Start | GPS8500 | 5000008286 |
| Portable Generator with Electr ic Start | GS8.5V | 5000007661 |
| Portable Generator with Electr ic Start | GS9.7V | 5000007662 |
| 50Hz Portable Generator | G3.3A | 5000008257, 5000008253, 5000008255 |
| 50Hz Portable Generator | G3.3AE | 5000008258, 5000008252, 5000008254, 5000008256, 5000008259 |
| Portable Generator with Electr ic Start | GS5.6A | 5000007191, 5000008046 |
| 50Hz Portable Generator | G4.6A | 5000008266, 5000008262, 5000008264 |
| 50Hz Portable Generator | G4.6AE | 5000008267, 5000008261, 5000008263, 5000008265, 5000008268 |
| 50Hz Portable Generator with E lectric Start | GS4.6A | 5000008275, 5000008271, 5000008273 |
| 50Hz Portable Generator with E lectric Start | GS4.6AE | 5000008276, 5000008270, 5000008272, 5000008274, 5000008277 |
| Portable Generator | G3.7A | 5000007189, 5000008044 |
| Portable Generator | G5.6A | 5000007190, 5000008045, 5000009431, 5000620008 |
| 50Hz Portable Generator 12 kVA | GS12Ai | 5000009108 |
| Portable Generator, 50Hz | G3.3AI | 5000009036 |
| Portable Generator, 50Hz | G4.6AI | 5000009037 |
| 50Hz Portable Generator with E lectric Start | GS4.6AI | 5000009038 |
| Portable Generator | G3.3AIT | 5000009460 |
| Portable Generator | G4.6AIT | 5000009461 |
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.
