Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number JKH63C23B800U found under Gear Assembly Speed Decreaser by Hansen Transmissions Inc. The National Stock Number assigned to this part is 3010013923514, 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 JKH63C23B800U.