| KOYO NF304 Bearing | 20 | 52 | 15 | KOYO | Cylindrical Roller Bearings | 
    | SKF 1304 E TN9  Bearing | 20 | 52 | 15 | SKF | Self-aligning Ball Bearings | 
    | NSK NU 304 Bearing | 20 | 52 | 15 | NSK | Cylindrical Roller Bearings | 
    | SKF 6304-2Z Bearing | 20 | 52 | 15 | SKF | Deep Groove Ball Bearings | 
    | KOYO 6304-2RS Bearing | 20 | 52 | 15 | KOYO | Deep Groove Ball Bearings | 
    | NACHI 1204 K+H 204 Bearing | 20 | 52 | 15 | NACHI | Self-aligning Ball Bearings | 
    | KOYO 6304 RU  Bearing | 20 | 52 | 15 | KOYO | Deep Groove Ball Bearings | 
    | KOYO 6304BI Bearing | 20 | 52 | 15 | KOYO | Angular Contact Ball Bearings | 
    | NSK NSKNU304ECP Bearing | 20 | 52 | 15 | NSK | Cylindrical Roller Bearings | 
    | KOYO NJ304+HJ304 Bearing | 20 | 52 | 15 | KOYO | Cylindrical Roller Bearings |