Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3124774X found under Parts Kit Hydraulic Transmission by Dana Holding Corporation. The National Stock Number assigned to this part is 2520000013490, 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 3124774X.