| National Precision Bearing p/n | MRC Part Number |
| SS6200 | 200-S-ST |
| SS6200-2RS | 200-SZZ-ST |
| SS6201 | 201-S-ST |
| SS6201-2RS | 201-SZZ-ST |
| SS6202 | 202-S-ST |
| SS6202-ZZ | 202-SFF-ST |
| SS6202-2RS | 202-SZZ-ST |
| SS6203 | 203-S-ST |
| SS6203-ZZ | 203-SFF-ST |
| SS6203-2RS | 203-SZZ-ST |
| SS6204 | 204-S-ST |
| SS6204-ZZ | 204-SFF-ST |
| SS6204-2RS | 204-SZZ-ST |
| SS6205 | 205-S-ST |
| SS6205-ZZ | 205-SFF-ST |
| SS6205-2RS | 205-SZZ-ST |
| SS6206 | 206-S-ST |
| SS6206-ZZ | 206-SFF-ST |
| SS6206-2RS | 206-SZZ-ST |