| ATTACHMENT METHOD | MOUNTING HOLE |
| BODY STYLE | WEBBED, OFFSET, WITH LIGHTENING HOLES |
| BORE STYLE | INVOLUTE SPLINE BOTH ENDS |
| BORE NOMINAL DIAMETER | 2.940 INCHES BOTH ENDS |
| END NOMINAL DIAMETER | 3.878 INCHES FIRST END |
| END NOMINAL LENGTH | 0.980 INCHES FIRST END |
| FACE NOMINAL WIDTH | 1.900 INCHES |
| FIRST STEP NOMINAL DIAMETER | 4.134 INCHES FIRST END |
| FIRST STEP NOMINAL LENGTH | 1.939 INCHES FIRST END |
| HARDNESS RATING | 60.0 ROCKWELL C NOMINAL TEETH |
| HARDNESS RATING | 50.0 ROCKWELL C NOMINAL HUB |
| HUB STYLE DESIGNATOR | PLAIN SECOND END |
| HUB NOMINAL DIAMETER | 3.937 INCHES SECOND END |
| HUB STYLE DESIGNATOR | 1 STEP FIRST END |
| MATERIAL DOCUMENT AND CLASSIFICATION | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 8620 OVERALL |
| MOUNTING HOLE NOMINAL DIAMETER | 0.750 INCHES TRANSVERSELY THROUGH FACE |
| MOUNTING HOLE TYPE AND QUANTITY | 3 PLAIN TRANSVERSELY THROUGH FACE |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.360 INCHES SECOND END |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 2.560 INCHES FIRST END |
| NOMINAL OUTSIDE DIAMETER | 11.657 INCHES |
| PITCH DIAMETER | 11.3333 INCHES NOMINAL |
| PRESSURE ANGLE | 20.0000 DEGREES |
| SPECIAL FEATURES | FIRST END COUNTERBORE,3.000 IN. DIA.,2.620 IN DEPTH |
| SPLINE PITCH DIAMETER | 2.7500 INCHES NOMINAL BOTH ENDS |
| SPLINE QUANTITY | 22 BOTH ENDS |
| STYLE DESIGNATOR | PROTRUDING HUBS |
| SURFACE TREATMENT | PHOSPHATE TEETH |
| TEETH QUANTITY | 68 |
| TOOTH FORM | STANDARD |