Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D5UU-05-1-1 found under Valve Safety Relief by Danco Valve Company. The National Stock Number assigned to this part is 4820011327091, 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 D5UU-05-1-1.