Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 8139143-00 found under by L3 Communications Corporation Emp. The National Stock Number assigned to this part is 5810015130412, and the Federal Supply Class is 5810 Communications Security Equipment And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 8139143-00.