Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ARC 515 278230 found under Switch Thermostatic by Chromalox Corp. The National Stock Number assigned to this part is 5930014411284, 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 ARC 515 278230.