Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U315-H513-X3 found under Switch Thermostatic by Siemens Schweiz Ag. The National Stock Number assigned to this part is 5930011171580, 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 U315-H513-X3.