Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 57530-502 found under Resistor Variable N by Safe Flight Instrument Corporation. The National Stock Number assigned to this part is 5905007765485, 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 57530-502.