Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F25-108-57 found under Switch Thermostatic by Ranco Inc. The National Stock Number assigned to this part is 5930014510643, 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 F25-108-57.