Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AY4523K found under Light Emitting Diod by Stanley Electronics Inc. The National Stock Number assigned to this part is 5980014355479, and the Federal Supply Class is 5980 Optoelectrical Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AY4523K.