Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3WA71 found under Heater Water Electric by Grainger Div Of W W Grainger Inc. The National Stock Number assigned to this part is 4520005523716, 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 3WA71.