Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 977440-103 found under Insulator Duct Supp by Aero Engineering And Manufacturing. The National Stock Number assigned to this part is 5970008024697, and the Federal Supply Class is 5970 Electrical Insulators And Insulating Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 977440-103.