Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1128EC40090-5 found under Duct Assembly Air Conditioning H by B H Aircraft Company Inc. The National Stock Number assigned to this part is 1660010605634, and the Federal Supply Class is 1660 Aircraft Air Conditioning Heating And Pressurizing Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1128EC40090-5.