| MATERIAL | STEEL OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-890,CL HG MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| HARDNESS RATING | 23.0 ROCKWELL C MINIMUM AND |
| 30.0 ROCKWELL C MAXIMUM BODY |
| 40.0 ROCKWELL C MINIMUM AND |
| 58.0 ROCKWELL C MAXIMUM TEETH |
| TEETH QUANTITY | 21 |
| TOOTH FORM | STANDARD |
| PRESSURE ANGLE | 20.0000 DEGREES |
| STYLE DESIGNATOR | HUBLESS |
| PITCH DIAMETER | 5.2500 INCHES NOMINAL |
| NOMINAL OUTSIDE DIAMETER | 5.750 INCHES |
| FACE NOMINAL WIDTH | 1.375 INCHES |
| BORE STYLE | INVOLUTE SPLINE BOTH ENDS |
| BORE NOMINAL DIAMETER | 1.656 INCHES BOTH ENDS |
| SPLINE QUANTITY | 27 BOTH ENDS |
| SPLINE PITCH DIAMETER | 1.6870 INCHES NOMINAL BOTH ENDS |
| BODY STYLE | PLAIN, SOLID |
| ATTACHMENT METHOD | MOUNTING HOLE |
| MOUNTING HOLE TYPE AND QUANTITY | 4 THREADED AXIALLY THROUGH BODY, FIRST END |
| MOUNTING HOLE THREAD SERIES DESIGNATOR | UNC AXIALLY THROUGH BODY, FIRST END |
| MOUNTING HOLE NOMINAL THREAD SIZE | 0.500 INCHES AXIALLY THROUGH BODY, FIRST END |
| MOUNTING HOLE THREAD QUANTITY PER INCH | 13 AXIALLY THROUGH BODY, FIRST END |
| BOLT HOLE CIRCLE NOMINAL DIAMETER | 3.375 INCHES AXIALLY THROUGH BODY, FIRST END |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 10001 |
| DESIGN CONTROL REFERENCE | 1213145 |