Lock-nuts and lock-washers are available separately for use to secure direct mount straight bore bearings. Lock-nuts can also be customized with jack screws and will press on the bearing inner ring to assist bearing mounting. For infrequent mounting, this is an economical tool that will simplify installation. PTI Lock Nut, Series: KM Series, 40 mm ID, 58 mm OD, 50 mm Diameter Face, M40 x 1.5 Thread, 9 mm Width