Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 90TDO393G4 found under Bearing Roller Tapered by Timken Company The. The National Stock Number assigned to this part is 3110001519530, 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 90TDO393G4.