| National Precision Bearing p/n | Aerospace-Ball-Bearing-Rod-end Part Number |
| MS21151-1 | MS21151 |
| MS21151-2 | MS21151 |
| MS21151-3 | MS21151 |
| MS21151-3C | MS21151 |
| MS21151-4 | MS21151 |
| MS21151-4C | MS21151 |
| MS21151-5 | MS21151 |
| MS21151-5C | MS21151 |
| MS21151-6 | MS21151 |
| MS21151-6C | MS21151 |
| MS21151-7 | MS21151 |
| MS21151-7C | MS21151 |
| MS21151-8 | MS21151 |
| MS21151-8C | MS21151 |
| MS21151-9 | MS21151 |
| MS21151-9C | MS21151 |
| MS21151-10 | MS21151 |
| MS21151-10C | MS21151 |
| MS21151-11 | MS21151 |
| MS21151-11C | MS21151 |
| MS21151-12 | MS21151 |
| MS21151-12C | MS21151 |
| MS21151-13 | MS21151 |
| MS21151-13C | MS21151 |