Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S40-00121 found under Cable Assembly Ribbon Electrical by Cooper Notification Inc. The National Stock Number assigned to this part is 6150015888700, and the Federal Supply Class is 6150 Miscellaneous Electric Power And Distribution Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S40-00121.