Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7 311180041 221 found under Insulation Blanket by Boeing Company The. The National Stock Number assigned to this part is 1660014712048, 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 7 311180041 221.