Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E-5-90 14IN found under Elbow Air Conditioning Heating by United Mcgill Corp. The National Stock Number assigned to this part is 4520010316598, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like E-5-90 14IN.