Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 26740666-01 found under Valve Assembly Envi by Hamilton Sundstrand Corporation. The National Stock Number assigned to this part is 1660001471007, 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 26740666-01.