Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R1398-2 found under Motor Transmission by United States Postal Service. The National Stock Number assigned to this part is 3010004059123, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R1398-2.