| STYLE DESIGNATOR | PLAIN |
| OUTSIDE DIAMETER | 3.875 INCHES NOMINAL |
| OVERALL LENGTH | 4.000 INCHES NOMINAL |
| FACE WIDTH | 2.250 INCHES NOMINAL |
| DESIGN FORM | PLAIN |
| LIGHTENING HOLE | NOT INCLUDED |
| INTEGRAL COOLING VANE | NOT INCLUDED |
| MATERIAL AND LOCATION | MILD STEEL OVERALL |
| GROOVE SHAPE | U |
| GROOVE QUANTITY | 2 |
| GROOVE DEPTH | 0.375 INCHES NOMINAL |
| GROOVE WIDTH | 0.938 INCHES NOMINAL |
| GROOVE RADIUS | 0.500 INCHES NOMINAL |
| BORE FEATURE | INCLUDED |
| BEARINGS | NOT INCLUDED |
| BORE TYPE | STRAIGHT |
| BORE DIAMETER | 1.563 INCHES NOMINAL |
| BORE LENGTH | 4.000 INCHES NOMINAL |
| COUNTERBORE FEATURE | NOT INCLUDED |
| KEYING FACILITY | INCLUDED |
| KEYING FACILITY TYPE | KEYWAY |
| QUANTITY | 3 |
| KEYWAY WIDTH | 0.250 INCHES NOMINAL |
| DISTANCE FROM CENTER OF BORE TO BOTTOM OF KEYWAY | 0.844 INCHES NOMINAL |
| KEYWAY SPACING IN DEG | 120.0 |
| PROTRUDING HUB CHARACTERISTIC | STEPPED |
| FIRST STEP FACE LARGEST DIAMETER AND LOCATION | 1.969 INCHES MINIMUM BOTH ENDS AND |
| 1.970 INCHES MAXIMUM BOTH ENDS |
| SECOND STEP FACE LARGEST DIAMETER AND LOCATION | 1.916 INCHES MINIMUM BOTH ENDS AND |
| 1.917 INCHES MAXIMUM BOTH ENDS |
| FIRST STEP LENGTH AND LOCATION | 0.438 INCHES NOMINAL BOTH ENDS |
| SECOND STEP LENGTH AND LOCATION | 0.438 INCHES NOMINAL BOTH ENDS |
| HUB END OUTSIDE DIAMETER AND LOCATION | 1.916 INCHES MINIMUM BOTH ENDS AND |
| 1.917 INCHES MAXIMUM BOTH ENDS |
| DISTANCE FROM OUTSIDE FLANGE/RIM TO HUB END AND LOCATION | 0.875 INCHES NOMINAL BOTH ENDS |
| SPLIT HUB FEATURE | NOT INCLUDED |