Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AE5 4 21 11A 3B 1400SER found under Switch Assembly by Rotork Controls Ltd. The National Stock Number assigned to this part is 5930014525494, 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 AE5 4 21 11A 3B 1400SER.