Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RD-3-15990-0 found under Heater Space Electric by Red Dot Corporation. The National Stock Number assigned to this part is 4520016245123, 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 RD-3-15990-0.