The LM603011HD is a tapered roller bearing cup from NTN Bower, built in the LM603000 catalog series. It measures 77.788 mm outside diameter by 15.08 mm width, machined to ABMA Class 4 (Inch) tolerance for precise fit against its mating cone. Pro Gear and Transmission sells this cup as a genuine NTN Bower part.Interchanges:Timken LM603011$16.71FeaturesTapered roller bearing cupOutside diameter: 77.788 mmCup width: 15.08 mmCatalog series: LM603000Tolerance class: ABMA Class 4 (Inch)Tech SpecsOutside diameter: 77.788 mmCup width: 15.08 mmCatalog series: LM603000Tolerance class: ABMA Class 4 (Inch)