Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 8663-A-103 found under Plate Retaining Bearing by L 3 Communications Essco Inc. The National Stock Number assigned to this part is 3110014289241, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 8663-A-103.