Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D4547 found under Duct Assembly Air C by Kirkhill Ta Co. The National Stock Number assigned to this part is 1660008398351, 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 D4547.