Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TMOSS-1516E4VXX found under Heating Element Electrical Immer by Chromalox Corp. The National Stock Number assigned to this part is 4520015367238, 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 TMOSS-1516E4VXX.