Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M3X 220 A18 found under Switch Flexible by L3 Communications Corp. The National Stock Number assigned to this part is 5930015663132, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M3X 220 A18.