Wacker Neuson 5000129977 Toothed Spring Washer

The Wacker Neuson is a genuine OEM Toothed Spring Washer designed for the BFS series floor saws. As a direct factory replacement, this washer delivers the precise clamping tension and vibration resistance required to keep critical fastened joints secure on high-cycle concrete cutting equipment. Sourced directly from Wacker Neuson, part is engineered to the exact tolerances of the original hardware. Confirmed fitment spans a wide range of BFS floor saw models, including the BFS735, BFS914, BFS935, BFS940, BFS1318, BFS1345, and BFS1350 series.

Key Features

• OEM Spring Tension Integrity — Manufactured to the original torque-retention specification, ensuring this toothed spring washer delivers the same clamping force as the factory-installed component under sustained vibration loads.
• Tooth Profile Locks Fasteners in Place — The serrated tooth profile bites into mating surfaces to resist loosening caused by the continuous blade vibration and engine harmonics common in floor saw operation.
• Drop-In Replacement — Matches the original hardware dimensions exactly, seating into existing bolt assemblies without rework or modification to surrounding components.
• Broad BFS Series Coverage — Fits the BFS735, BFS914, BFS935, BFS940, BFS1318, BFS1345, and BFS1350 floor saw families across multiple machine generations, making it a practical stock item for fleets running mixed BFS equipment.
• Prevents Fastener Creep on Cutting Equipment — A worn or missing toothed spring washer can allow fasteners to back out during operation, compromising blade guard alignment and structural joint integrity on the saw.
• Fastener Safety Compliance — On floor saws where blade assemblies and guard hardware rely on positive fastener retention, using the correct spring washer specification is essential to maintaining safe, controlled cutting operation.

A toothed spring washer is a hardened, serrated locking washer that sits beneath a bolt head or nut to prevent the fastener from backing out under vibration. The teeth dig into both the fastener and the mating surface, creating mechanical resistance to rotational loosening — a critical function on gasoline-powered floor saws that transmit constant engine and blade vibration through the chassis. When a toothed spring washer becomes flattened, corroded, or is missing entirely, fasteners in that joint lose their locking resistance, which can lead to progressive loosening, misalignment of components, and potential structural or safety issues during cutting operations.

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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