Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AK4583 657-D SIZE 45 found under Actuator Hydraulic by Fisher Controls Co Inc. The National Stock Number assigned to this part is 3010012898047, 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 AK4583 657-D SIZE 45.