Wacker Neuson 5000116124 Lock Nut M12 Hex Serrated Flange Zinc Plated

The Wacker Neuson is a genuine OEM Lock Nut M12 Hex Serrated Flange Zinc Plated designed for a broad range of Wacker Neuson equipment including CRT48-57K ride-on concrete trowels, G25, G125, and G155 mobile generators, P35A and P35 wet screed power units, PV35A pole vibrators, and MGT1 series mobile generator trailers. As a direct OEM replacement, part is manufactured to the same specifications as the original hardware installed at the factory, ensuring consistent clamping force and thread engagement across all listed applications. The zinc plating provides corrosion resistance suited to the varied environments these machines operate in, from concrete finishing floors to outdoor generator setups. When you need a hardware solution that installs straight to spec, the is the correct part to reach for.

Key Features

• Genuine OEM Hardware Grade — Manufactured to Wacker Neuson's original torque and thread-engagement specifications, ensuring consistent clamping performance across every listed application.
• Serrated Flange Locking Action — The integrated hex serrated flange bites into the mating surface under load, resisting vibration-induced loosening without requiring a separate lock washer.
• Zinc-Plated Corrosion Resistance — The zinc coating protects the M12 nut against rust and surface oxidation in wet, outdoor, and concrete finishing environments.
• Wide Cross-Family Fitment — A single part number covers CRT48-57K ride-on trowels, P35/P35A wet screed power units, G25/G125/G155 mobile generators, MGT1/MGT1S/MGT1E trailer units, and the PV35A pole vibrator.
• Drop-In M12 Replacement — Standard M12 hex drive installs with common workshop tooling; the serrated flange seats flush, requiring no additional hardware or thread preparation.
• Vibration-Critical Application Fit — On concrete trowels and screed power units especially, a properly functioning lock nut prevents structural fastener loss during sustained high-cycle operation.

A lock nut with a serrated flange serves two purposes in one fastener: it threads onto an M12 bolt to clamp components together, and the serrations on its flange face grip the mating surface to resist backing off under vibration. On equipment like concrete trowels, screed power units, and portable generators, fasteners are exposed to continuous engine vibration and mechanical cycling that can gradually work standard nuts loose over time. When a lock nut fails or is missing, the clamped joint loses preload, leading to movement, wear, and potential structural failure at that connection point. Using the correct OEM-spec replacement like the Wacker Neuson 5000116124 ensures the joint holds to its designed clamping load through the full service life of the assembly.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

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