| SKF 2304 E-2RS1 TN9 Bearing | 20 | 52 | 21 | SKF | Self-aligning Ball Bearings | 
    | NACHI NJ 2304 E Bearing | 20 | 52 | 21 | NACHI | Cylindrical Roller Bearings | 
    | FAG NUP2304E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings | 
    | KOYO NUP 2304 Bearing | 20 | 52 | 21 | KOYO | Cylindrical Roller Bearings | 
    | SKF NU2304E Bearing | 20 | 52 | 21 | SKF | Cylindrical Roller Bearings | 
    | FAG NJ 2304 E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings | 
    | FAG NU2304E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings | 
    | FAG NU 2304 E.TVP2 Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings | 
    | NSK 2304 Bearing | 20 | 52 | 21 | NSK | Self-aligning Ball Bearings | 
    | SKF 2304 TN  Bearing | 20 | 52 | 21 | SKF | Self-aligning Ball Bearings |