Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 39C125G20 found under Heating Element Electrical Nonim by Wellman Thermal Systems Corp. The National Stock Number assigned to this part is 4520001103729, 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 39C125G20.