Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9999-45570 found under Support Electrical Card Holder by Engine Monitor Inc. The National Stock Number assigned to this part is 5998013957582, and the Federal Supply Class is 5998 Electrical And Electronic Assemblies Boards Cards And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 9999-45570.