Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 311-1568-00 found under Resistor Variable N by Tektronix Inc. The National Stock Number assigned to this part is 5905011135140, 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 311-1568-00.