Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RFSN 9 found under Switch Liquid Level by Little Giant Pump Co. The National Stock Number assigned to this part is 5930015918313, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RFSN 9.