Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A1004 found under Insulator Disk by Kelly Manufacturing Company. The National Stock Number assigned to this part is 5970003459701, 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 A1004.