Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 11 002 021 W 18 003 001 found under Valve Regulating Fl by Norgren C A Co. The National Stock Number assigned to this part is 4820013500213, 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 11 002 021 W 18 003 001.