Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4M3011-433A-1J found under Valve Butterfly by Dover Resources Inc. The National Stock Number assigned to this part is 4820014831146, 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 4M3011-433A-1J.