Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 53C1-50S found under Resistor Variable N by Clarostat Sensors And Controls. The National Stock Number assigned to this part is 5905008077671, 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 53C1-50S.