The Muncie 399010000 is a genuine Muncie nut for PTO (Power Takeoff) applications. Muncie Power Products is a recognized name in PTO systems for heavy-duty trucks and vocational equipment, and this nut is a direct OEM-grade replacement component designed to work within Muncie PTO assemblies. Sourced and sold by Pro Gear and Transmission, this part is the correct choice when your Muncie PTO requires this specific nut. Not sure this is your part? Call us to confirm proper fit for your application before ordering.FeaturesGenuine Muncie part number 399010000Designed for use in Muncie PTO assembliesOEM-grade replacement nut componentSold by Pro Gear and Transmission