Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 540-00001-06 found under Resistor Variable W by Rycom Instruments. The National Stock Number assigned to this part is 5905009085492, 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 540-00001-06.