Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F53389-X found under Transmission Mechan by Koehring Cranes And Excavators Inc. The National Stock Number assigned to this part is 2520000628196, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like F53389-X.