The Chelsea 379833 is a nut seal designed for Chelsea power takeoff units. Nut seals serve a critical sealing function at threaded shaft or housing interfaces, preventing lubricant loss and contamination ingress in PTO applications. This is a genuine Chelsea part, sourced and sold by Pro Gear and Transmission. If you need to verify this is the correct seal for your specific Chelsea PTO model, give us a call before ordering.FeaturesGenuine Chelsea PTO replacement partPart number: 379833Designed to seal threaded shaft or housing interfaces on Chelsea PTO unitsHelps prevent lubricant loss and contamination ingressSold by Pro Gear and TransmissionUsed in these Chelsea PTO models242 Series244 Series245 Series246 Series