Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 660509313 found under Ring Bearing Inner by Triumph Actuation Systems Uk Limited. The National Stock Number assigned to this part is 3110013764753, 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 660509313.