Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 17I1728-401 found under Insulation Sleeving by General Services Administration Inc. The National Stock Number assigned to this part is 5970008546713, 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 17I1728-401.