Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4450 FLGPC19 found under Seat Valve by Atkomatic Valve Co Inc. The National Stock Number assigned to this part is 4820011375906, 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 4450 FLGPC19.