| National Precision Bearing p/n | BCA Part Number |
| 6000 | 100 |
| 6000Z | 100S |
| 6000ZZ | 100SS |
| 6000RS | 100D |
| 60002RS | 100DD |
| 6000NR | 100L |
| 6000ZNR | 100SL |
| 6200 | 200 |
| 6200Z | 200S |
| 6200ZZ | 200SS |
| 6200RS | 200D |
| 62002RS | 200DD |
| 6200NR | 200L |
| 6200ZNR | 200LS |
| 6300 | 300 |
| 6300Z | 300S |
| 6300ZZ | 300SS |
| 6300RS | 300D |
| 63002RS | 300DD |
| 6300NR | 300L |
| 6300ZNR | 300SL |