Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RTD4 found under Resistor Thermal by Federal Div Of Victoreen Instrum. The National Stock Number assigned to this part is 5905001755447, and the Federal Supply Class is 5905 Resistors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RTD4.