Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S31U DN150 found under Valvebutterfly by Bray International Inc. The National Stock Number assigned to this part is 4810016920506, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S31U DN150.