| ATTACHMENT METHOD | MOUNTING HOLE |
| BORE NOMINAL DIAMETER | 0.252 INCHES BOTH ENDS |
| BORE STYLE | INVOLUTE SPLINE BOTH ENDS |
| FACE NOMINAL WIDTH | 1.106 INCHES |
| FACE TYPE | STRAIGHT |
| HARDNESS RATING | 48.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM TEETH |
| HELIX ANGLE | 12.1000 DEGREES |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| PITCH DIAMETER | 0.4470 INCHES NOMINAL |
| MATERIAL | STEEL COMP 4130 OVERALL |
| MOUNTING HOLE NOMINAL DIAMETER | 0.024 INCHES TRANSVERSELY THROUGH FACE |
| MOUNTING HOLE TYPE AND QUANTITY | 2 PLAIN TRANSVERSELY THROUGH FACE |
| NOMINAL OUTSIDE DIAMETER | 0.503 INCHES |
| PRESSURE ANGLE | 20.0000 DEGREES |
| SPLINE PITCH DIAMETER | 0.2320 INCHES NOMINAL BOTH ENDS |
| SPLINE QUANTITY | 12 BOTH ENDS |
| STYLE DESIGNATOR | HUBLESS |
| SURFACE TREATMENT | OXIDE OVERALL |
| THREAD FORM DIRECTION | RIGHT-HAND |
| THREAD FORM QUANTITY | 3 |