Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D4400 REV1 IT 10 found under Disk Valve by Danco Valve Company. The National Stock Number assigned to this part is 4820014615224, 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 D4400 REV1 IT 10.