Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EM91 79 5 found under Valve Assembly Hydr by The Boeing Company. The National Stock Number assigned to this part is 1650015272931, 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 EM91 79 5.