Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3500-15L90C B208-T117 found under Switch Thermostatic by Elmwood Sensors Inc. The National Stock Number assigned to this part is 5930014503391, 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 3500-15L90C B208-T117.