Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DF6002-400 FN-13 found under Seat Valve by Huntington Ingalls Incorporated. The National Stock Number assigned to this part is 4820014202522, 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 DF6002-400 FN-13.