Castle Nut, 4D18

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Hex castle nut designed to secure your important Bobcat parts.

Due to engineering standards, some parts are updated or changed and are assigned a new part number. Previous part number was 4D000018B. This part is the direct replacement.

Fits the following Bobcat equipment: Rotary Cutter, 444M, 500, 600, 610, 611

Parts can vary depending on your serial number. Check the Bobcat Online Parts Catalog to ensure the correct part for your equipment.

More Information
Model Compatibility

 Rotary Cutter, 444M, 500, 600, 610, 611

WARNING: This product can expose you to chemicals including lead and lead compounds, mineral oils, and phthalates which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to