Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EM6003-1 found under Heat Exchanger Air by Western Sky Industries Llc. The National Stock Number assigned to this part is 1660015257291, 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 EM6003-1.