Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4 2339 421482 found under Switch Thermostatic by U Line Corporation. The National Stock Number assigned to this part is 5930012061123, 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 4 2339 421482.