Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5R0-28-9 found under Light Emitting Diod by Sloan Company The. The National Stock Number assigned to this part is 5980011374668, 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 5R0-28-9.