Bomag 05994004 Spring Cotter

The Bomag 05994004 Spring Cotter is a genuine OEM replacement designed for a wide range of Bomag single drum rollers, tandem rollers, walk-behind rollers, vibratory plates, reversible vibratory plates, pneumatic tyred rollers, recyclers/stabilizers, trench compactors, soil compactors, refuse/landfill compactors, cold milling machines, and pavers. Sourced directly from Bomag, this spring cotter matches the exact specification of the original hardware it replaces, ensuring a correct installation without guesswork. Compatible models include BW-series rollers, BP and BPR vibratory plates, MPH and RS recyclers/stabilizers, BC compactors, BM cold milling machines, and many more — covering an extensive range of Bomag equipment across multiple product families. Whether you are performing routine service or addressing a fastener failure in the field, part number 05994004 is the correct OEM solution.

Key Features

• Genuine OEM Fastener Integrity — manufactured to Bomag's original material and dimensional specification, so this spring cotter delivers the correct retention force and pin engagement every time it is installed
• Direct-Fit Replacement — this spring cotter drops into the same pin or shaft bore as the original, requiring only standard hand tools for installation across all covered models
• Broad Equipment Coverage — fits an extensive cross-section of Bomag machinery, including BW single drum and tandem rollers, BP and BPR vibratory plates, MPH and RS recyclers/stabilizers, BC compactors, BMP trench compactors, BM cold milling machines, and more
• Positive Component Retention — a correctly fitted spring cotter locks pins and shafts in place under vibration and load; a missing or worn cotter allows components to shift, causing accelerated wear or sudden mechanical failure
• Correct Hardware for Safety-Critical Joints — cotter pins secure linkage and pivot joints where unintended movement could compromise operator safety or machine control; always replace with the specified OEM part number 05994004

A spring cotter is a small but essential fastening component used to lock a pin, bolt, or shaft in position and prevent it from backing out under vibration or cyclic load — conditions that are constant in compaction and milling equipment. Once inserted through a drilled hole in the pin or shaft, the cotter's spring legs splay outward to hold it firmly in place. When a spring cotter is missing, damaged, or substituted with an incorrect size, the retained component can shift or disengage entirely, leading to wear on surrounding parts, loss of control linkage function, or unexpected mechanical failure during operation. Replacing a worn or lost spring cotter promptly with the correct OEM part is one of the simplest preventive measures an operator or technician can take to protect a machine's moving assemblies.

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.

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.