Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 77-040N-5917R30 found under Valve Butterfly by Flowline Valve And Controls L L C. The National Stock Number assigned to this part is 4820016523958, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 77-040N-5917R30.