Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 61-1902-1 found under Heating Element Electrical Nonim by Elmwood Sensors Inc. The National Stock Number assigned to this part is 4520004809420, 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 61-1902-1.