| MATERIAL | STEEL COMP 8640 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | FED STD 66,AISI/SAE MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE OVERALL |
| HARDNESS RATING | 14.0 ROCKWELL C MINIMUM AND |
| 23.0 ROCKWELL C MAXIMUM OVERALL |
| TEETH QUANTITY | 38 |
| TOOTH FORM | STANDARD |
| PRESSURE ANGLE | 20.0000 DEGREES |
| PRECISION CLASSIFICATION | QUALITY NUMBER 5 OR |
| QUALITY NUMBER 6 |
| STYLE DESIGNATOR | PROTRUDING HUB, RECESSED BODY |
| PITCH DIAMETER | 0.9500 INCHES NOMINAL |
| NOMINAL OVERALL LENGTH | 0.384 INCHES |
| NOMINAL OUTSIDE DIAMETER | 0.999 INCHES |
| FACE NOMINAL WIDTH | 0.187 INCHES |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.197 INCHES FIRST END |
| BODY RECESS NOMINAL DEPTH | 0.062 INCHES SECOND END |
| BORE STYLE | INVOLUTE SPLINE BOTH ENDS |
| BORE NOMINAL DIAMETER | 0.191 INCHES BOTH ENDS |
| SPLINE QUANTITY | 21 BOTH ENDS |
| SPLINE PITCH DIAMETER | 0.1750 INCHES NOMINAL BOTH ENDS |
| COUNTERBORE NOMINAL DEPTH | 0.252 INCHES COUNTERBORE, FIRST END |
| COUNTERBORE NOMINAL DIAMETER | 0.187 INCHES COUNTERBORE, FIRST END |
| HUB STYLE DESIGNATOR | PLAIN FIRST END |
| HUB NOMINAL DIAMETER | 0.312 INCHES FIRST END |
| BODY STYLE | WEBBED, OFFSET, SOLID |
| ATTACHMENT METHOD | MOUNTING HOLE |
| MOUNTING HOLE TYPE AND QUANTITY | 2 PLAIN AXIALLY THROUGH BODY, FIRST END |
| MOUNTING HOLE NOMINAL DIAMETER | 0.109 INCHES AXIALLY THROUGH BODY, FIRST END |
| BOLT HOLE CIRCLE NOMINAL DIAMETER | 0.390 INCHES AXIALLY THROUGH BODY, FIRST END |