The Wacker Neuson Lock Washer A16 External Star is a genuine OEM fastening component designed for the G150, G180, G240, and G320 series portable generators. As a direct OEM part, the is manufactured to the same specification as the original hardware installed on the production line, ensuring a correct fit without guesswork. This Lock Washer A16 External Star is compatible across a wide range of G-series generator configurations, including Standard, Cold Weather, Custom, and Tier 4 variants, covering both skid-mount and mobile generator platforms. Confirm your model number against the fitment list before ordering to ensure the right part reaches your machine.
Key Features
- Genuine OEM Hardware Specification — Manufactured to the exact dimensional and material standard of the original A16 external star lock washer, maintaining correct clamping load and bite on the mating fastener.
- External Star Profile Locks Under Load — The external star tooth geometry bites into the bearing surface when torqued, resisting loosening from vibration — a critical characteristic in generator applications where continuous engine vibration is present.
- Broad G-Series Generator Compatibility — Fits G150, G180, G230, G240, and G320 generator models across Standard, Cold Weather, Custom, and Tier 4/Tier 4i configurations, including Transport Canada-compliant units.
- Drop-In Replacement Hardware — Matches the original washer's inner diameter and outer profile, seating correctly against the same fastener and mating surface without any rework or modification to surrounding components.
- Prevents Fastener Back-Out in Service — A failed or missing lock washer allows critical fasteners to work loose during operation, potentially causing panel, component, or wiring damage on the generator set. Replacing with the correct OEM part restores designed clamping integrity.
A lock washer is a thin hardened ring installed under a nut or bolt head to prevent the fastener from loosening due to vibration or dynamic loading. The external star design features outward-pointing teeth that dig into the bearing surface of the mating component as the fastener is tightened, creating a mechanical resistance to rotation that keeps the joint secure over time. In generator applications — where the engine runs continuously and vibration is constant — a worn, deformed, or missing lock washer can allow critical fasteners to back out, leading to loose connections, damaged hardware, or component failure that may be difficult to trace back to a single missing washer.
Part Details
| Part Number | 5000178507 |
|---|---|
| Old Part Number | 0178507 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lock Washer A16 External Star |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| G150-GENERATOR, SKID, CUSTOM, DEERE T3 | G150 | 5000620657, 5200001321, 5000620656, 5000620306, 5000620655, 5200003160, 5000620889, 5000620307, 5200007860, 5000620308, 5000620887, 5000620888, 5200014784, 5200025554, 5200006902, 5100026980, 5100026981, 5100026982, 5100029212, 5100025830 |
| G180-GENERATOR, SKID, CUSTOM, DEERE T3 | G180 | 5000620660, 5200001322, 5000620303, 5000620658, 5000620659, 5200003161, 5000620886, 5000620884, 5200007861, 5000620304, 5000620885, 5000620305, 5200014470, 5200014471, 5200014469, 5200025555, 5200006903, 5100025832, 5100025842 |
| G240-GENERATOR, SKID, CUSTOM, DEERE T3 | G240 | 5000620663, 5200001323, 5000620662, 5000620300, 5000620661, 5200003162, 5000620301, 5000620302, 5200025556, 5200006904, 5100025834 |
| G230 Generator, Custom T4i | G230 | 5000620883, 5000620881, 5000620882, 5200007862, 5100045597 |
| G320 Generator, Standard T4i | G320 | 5000620275, 5200008718, 5200010219, 5200010260, 5200010144, 5200010145, 5200010146, 5100045191, 5100045601, 5100045602, 5200008717, 5100018533, 5100049848, 5100049849, 5200010261 |
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.
