| RIV NJ 304 Bearing | 20 | 52 | 15 | RIV | Cylindrical Roller Bearings |
| KOYO 1304 Bearing | 20 | 52 | 15 | KOYO | Self-aligning Ball Bearings |
| NACHI 7304B Bearing | 20 | 52 | 15 | NACHI | Angular Contact Ball Bearings |
| NSK NJ 309 E +HJ 310 E Bearing | 20 | 52 | 15 | NSK | Cylindrical Roller Bearings |
| NSK NSK6304-2RSH Bearing | 20 | 52 | 15 | NSK | Deep Groove Ball Bearings |
| SKF N304E Bearing | 20 | 52 | 15 | SKF | Cylindrical Roller Bearings |
| SKF 6304-2ZNR Bearing | 20 | 52 | 15 | SKF | Deep Groove Ball Bearings |
| SKF W 6304-2RS1 Bearing | 20 | 52 | 15 | SKF | Deep Groove Ball Bearings |
| SKF 7304 BEP Bearing | 20 | 52 | 15 | SKF | Angular Contact Ball Bearings |
| SKF 7304BEY Bearing | 20 | 52 | 15 | SKF | Angular Contact Ball Bearings |