Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M221US1A5419 found under Switch Toggle by Panel Components And Systems Inc. The National Stock Number assigned to this part is 5930015334838, 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 M221US1A5419.