Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40D400166G1 found under Heating Element Electrical Immer by Wellman Thermal Systems Corp. The National Stock Number assigned to this part is 4540000802168, 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 40D400166G1.