Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 393-878153-000 REV.6 found under Heating Element Electrical Nonim by Chromalox Corp. The National Stock Number assigned to this part is 4520015615334, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 393-878153-000 REV.6.