Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RD240-N1B1 found under Knob by Dupree Inc. The National Stock Number assigned to this part is 5355014973333, and the Federal Supply Class is 5355 Knobs And Pointers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RD240-N1B1.