| National Precision Bearing p/n | Hoover Part Number |
| 6000 | 100 |
| 6000Z | 7100 |
| 6000ZZ | 77100 |
| 6000RS | 9100 |
| 60002RS | 99100 |
| 6000NR | 100G |
| 6000ZNR | 7100G |
| 6200 | 200 |
| 6200Z | 7200 |
| 6200ZZ | 77200 |
| 6200RS | 9200 |
| 62002RS | 99200 |
| 6200NR | 200G |
| 6200ZNR | 7200G |
| 6300 | 300 |
| 6300Z | 7300 |
| 6300ZZ | 77300 |
| 6300RS | 9300 |
| 63002RS | 99300 |
| 6300NR | 300G |
| 6300ZNR | 7300G |