This single row deep groove ball bearing carries a bore of 105.0 mm, an outside diameter of 160.0 mm, and a width of 26.0 mm, with a net mass of 1.66 kg. It is fitted with steel sheet metal shields on both sides and a steel sheet metal cage (JN). The radial internal clearance is C4 (Group 4), providing a larger clearance range than standard. Limiting speed is rated at 4850 1/min, with a reference speed of 4950 1/min. The C4 clearance compensates for thermal expansion and shaft fit conditions where a standard clearance bearing would run too tight, making this variant suitable where operating temperatures raise the effective preload of the rings. The shields protect the raceway and balls from coarse contamination while allowing grease relubrication is not intended, as shields are not full contact seals. Dimensionally and constructionally this bearing corresponds to SKF 6021-2Z/C4, NSK 6021ZZC4, and NTN 6021ZZC4.