| ATTACHMENT METHOD | MOUNTING HOLE |
| BODY STYLE | WEBBED, WITH LIGHTENING HOLES |
| BORE NOMINAL DIAMETER | 0.622 INCHES BOTH ENDS |
| BORE STYLE | INVOLUTE SPLINE BOTH ENDS |
| FACE NOMINAL WIDTH | 0.375 INCHES |
| HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| HUB NOMINAL DIAMETER | 1.000 INCHES BOTH ENDS |
| HUB STYLE DESIGNATOR | PLAIN BOTH ENDS |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4340 OVERALL |
| MOUNTING HOLE NOMINAL DIAMETER | 0.317 INCHES AXIALLY THROUGH BODY FIRST END |
| MOUNTING HOLE TYPE AND QUANTITY | 4 PLAIN AXIALLY THROUGH BODY FIRST END |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.187 INCHES BOTH ENDS |
| NOMINAL OUTSIDE DIAMETER | 5.215 INCHES |
| PITCH DIAMETER | 4.9120 INCHES NOMINAL |
| PRESSURE ANGLE | 20.0000 DEGREES |
| SPLINE PITCH DIAMETER | 0.7188 INCHES NOMINAL BOTH ENDS |
| SPLINE QUANTITY | 23 BOTH ENDS |
| STYLE DESIGNATOR | PROTUDING HUBS |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-STD-171E MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE OVERALL |
| TEETH QUANTITY | 40 |