Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RV7 8 S227B found under Resistor Variable W by Sensor Systems Inc. The National Stock Number assigned to this part is 5905006159078, 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 RV7 8 S227B.