| National Precision Bearing p/n | NMB Part Number |
| MS21151-1 | ABRL3M-1 |
| MS21151-2 | ABR3M-2 |
| MS21151-3 | ABR3M-3 |
| MS21151-3C | ABR3M-3W |
| MS21151-4 | ABR3M-4 |
| MS21151-4C | ABR3M-4W |
| MS21151-5 | ABRL3M-5 |
| MS21151-5C | ABRL3M-5W |
| MS21151-6 | ABR3M-6 |
| MS21151-6C | ABR3M-6W |
| MS21151-7 | ABR3M-7 |
| MS21151-7C | ABR3M-7W |
| MS21151-8 | ABR4M-8 |
| MS21151-8C | ABR4M-8W |
| MS21151-9 | ABRL4M-9 |
| MS21151-9C | ABRL4M-9W |
| MS21151-10 | ABR5M-10 |
| MS21151-10C | ABR5M-10W |
| MS21151-11 | ABR5M-11 |
| MS21151-11C | ABR5M-11W |
| MS21151-12 | ABR5M-12 |
| MS21151-12C | ABR5M-12W |
| MS21151-13 | ABR10M-13 |
| MS21151-13C | ABR10M-13W |
| MS21153-1 | ABR3F-1 |
| MS21153-2 | ABR3F-2 |
| MS21153-3 | ABR3F-3 |
| MS21153-4 | ABRL3F-4 |
| MS21153-5 | ABRL3F-5 |
| MS21153-6 | ABR4F-6 |
| MS21153-6C | ABR4F-6W |
| MS21153-7 | ABRL4F-7 |
| MS21153-7C | ABRL4F-7W |
| MS21153-8 | ABR4F-8 |
| MS21153-9 | ABRL4F-9 |
| MS21153-10 | ABR5F-10 |
| MS21153-11 | ABRL5F-11 |