M86643HD is a tapered roller bearing cone from NTN Bower, part of the M86600 catalog series. It is built to ABMA Class 4 (Inch) tolerance class for precise fit and rotation in heavy-duty applications. This is a genuine NTN Bower component sold by Pro Gear and Transmission.Interchanges:Timken M86643$100.27FeaturesTapered roller bearing coneNTN Bower catalog series M86600ABMA Class 4 (Inch) tolerance classPart number M86643HDTech SpecsCatalog series: M86600Tolerance class: ABMA Class 4 (Inch)