Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U28-5537REV0 found under Switch Rotary by Raytheon Company. The National Stock Number assigned to this part is 5930005484961, 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 U28-5537REV0.