Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 29790-9A found under Valve Assembly Air Flow by Rockwell Collins Inc. The National Stock Number assigned to this part is 4820010529970, 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 29790-9A.