Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 243-000090-00 found under Resistor Variable W by Guardian Electric. The National Stock Number assigned to this part is 5905004970954, 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 243-000090-00.