Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 668B083U04 found under Valve Assembly by Fischer Connectors Inc. The National Stock Number assigned to this part is 4820002114550, 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 668B083U04.