Wacker Neuson 5000164334 M5x12 Hex Head Serrated Flange Bolt Black Zinc Coated

The Wacker Neuson is a genuine OEM M5x12 Hex Head Serrated Flange Bolt Black Zinc Coated designed for BS50-4 and BS60-4 series gasoline vibratory rammers. Sourced directly from Wacker Neuson, this bolt matches the original hardware specification used on the production line across the full BS50-4 and BS60-4 model range, including standard, EU, and high-altitude configurations fitted with 280mm/11in shoes. The serrated flange provides built-in locking action that resists loosening under the sustained vibration load that these rammers generate during trench and cohesive soil compaction work. If you are servicing or reassembling a BS50-4s, BS60-4, or BS60-4s rammer, part number is the correct fastener to restore the machine to its original build spec.

Key Features

• Integrated Serrated Flange Locking — The flange's serrated edge bites into the mating surface on installation, providing mechanical resistance to self-loosening under continuous vibration without needing a separate lock washer.
• Genuine OEM Sourcing — Manufactured to the same material grade and dimensional tolerance as the bolt originally installed at the Wacker Neuson factory, ensuring correct thread engagement and clamp load.
• Black Zinc Coating — The zinc coating provides a corrosion-resistant barrier suited to the outdoor, high-moisture environments where rammers are routinely operated.
• Broad BS-Series Fitment — Confirmed for BS50-4, BS50-4s, BS60-4, and BS60-4s models across standard, EU, and high-altitude variants with 280mm/11in shoes — covering the widest spread of the BS four-stroke rammer family.
• Drop-In Hardware Replacement — M5x12 sizing and hex head drive match the original fastener geometry, allowing direct installation with standard hand tools during routine maintenance or full rebuild work.

A hex head serrated flange bolt combines three functions in a single fastener: the hex head provides a standard drive interface for installation and removal, the flange distributes clamp load across a wider bearing area to protect softer mating surfaces, and the serrated edge on the underside of the flange locks the bolt in place by creating mechanical interference with the joined material. On a vibratory rammer like the BS50-4 or BS60-4, this anti-loosening characteristic is especially critical — the machine's operating cycle generates constant reciprocating force that can work conventional fasteners loose over time, leading to component movement, accelerated wear, and potential structural failure if left unchecked.

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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