Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CS-001823 ITEM 3 found under Seat Valve by Itt Fluid Technology Corp. The National Stock Number assigned to this part is 4820013402275, 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 CS-001823 ITEM 3.