| Part Number | KP21B |
| System of Measurement | Inch |
| Standard Reference | MS27642-21 |
| Bore Dia | 1.313″ |
| Bore Dia Tolerance | -0.0010″ to 0″ |
| Outer Dia | 2.0625″ |
| Outer Dia Tolerance | -0.0010″ to 0″ |
| Ring Width Outer Height | 0.375″ |
| Ring Width Outer Height Tolerance | -0.005″ to 0″ |
| Ring Width Inner Width | 0.437″ |
| Ring Width Inner Width Tolerance | -0.005″ to 0″ |
| Ball Complement No | 28 |
| Ball Complement Dia | 0.1875″ |
| Ring Shoulder Outer | 1.912″ |
| Ring Shoulder Inner | 1.512″ |
| Ring Chamfer Outer | 0.024″ |
| Ring Chamfer Outer Tolerance | 0″ to 0.015″ |
| Ring Chamfer Inner | 0.024″ |
| Ring Chamfer Inner Tolerance | 0″ to 0.015″ |
| Radial Internal Clearance | 0.0003″ to 0.0010″ |
| Static Radial Load | 9840 lbs |
| Static Thrust Load | 4400 lbs |
| Dynamic Radial Ring Inner Load | 4590 lbs |
| Dynamic Radial Ring Outer Load | 4290 lbs |
| Max Starting Torque | 7 oz-in |
| Weight | 0.16 lbs |