Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M405B1003 found under Gearcase Motor by Honeywell International Inc. The National Stock Number assigned to this part is 3010008770324, 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 M405B1003.