Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 420 68 6564 found under Resistor Variable W by L 3 Communications Electron. The National Stock Number assigned to this part is 5905006659227, 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 420 68 6564.