Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D81-89-3 found under Rotor Electrical Sw by Delta Electronics Inc. The National Stock Number assigned to this part is 5930014429576, 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 D81-89-3.