Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5903947 found under Valve Vent by Hamilton Sundstrand Corporation. The National Stock Number assigned to this part is 1650011547946, and the Federal Supply Class is 1650 Aircraft Hydraulic Vacuum And De-Icing System Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5903947.