Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M21-23H-501A found under Motor Direct Current by American Precision Industries Inc. The National Stock Number assigned to this part is 6105010933689, and the Federal Supply Class is 6105 Motors Electrical. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M21-23H-501A.