Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 86C56 found under Diffuser Air Aircra by Grimes Aerospace Company. The National Stock Number assigned to this part is 1660004007739, 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 86C56.