Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1E-13663-1821 found under Switch Lever by Capitol Electronics Inc. The National Stock Number assigned to this part is 5930011557764, 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 1E-13663-1821.