This locknut secures bearings and adapter or withdrawal sleeves on a shaft by threading against a matching locking washer, transmitting axial clamping force through the nut face. Main dimensions follow DIN 981, giving a width of 19.0 mm and a net mass of 1.018 kg, so the part fits directly onto shaft threads sized to this standard. Because the design is standardized to DIN 981, KM22 mates with corresponding lock washers of the same series, allowing the bearing assembly to be positioned axially and locked against loosening under vibration. The threaded connection permits controlled tightening to set internal clearance during mounting, and the nut can be removed for maintenance without damaging the shaft thread.