Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C2203-0013 found under Seat Holder Assembly Valve by Circor Aerospace Inc. The National Stock Number assigned to this part is 4820006282507, 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 C2203-0013.