Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PT3-4C219-9 found under Resistor Variable W by Data Instruments Inc. The National Stock Number assigned to this part is 5905001777391, 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 PT3-4C219-9.