| ATTACHMENT METHOD | MOUNTING HOLE |
| BODY STYLE | PLAIN, SOLID |
| BORE STYLE | W/ KEYWAY BOTH ENDS |
| BORE NOMINAL DIAMETER | 0.500 INCHES BOTH ENDS |
| FACE NOMINAL WIDTH | 0.188 INCHES |
| FIRST GROOVE NOMINAL DIAMETER | 0.664 INCHES FIRST END |
| FIRST GROOVE NOMINAL WIDTH | 0.125 INCHES FIRST END |
| HUB NOMINAL DIAMETER | 0.750 INCHES FIRST END |
| HUB STYLE DESIGNATOR | 2 GROOVES FIRST END |
| KEYWAY NOMINAL WIDTH | 0.094 INCHES BOTH ENDS |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-721,CLASS B,TEMPER 1/2 HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | COPPER ALLOY OVERALL |
| MOUNTING HOLE NOMINAL DIAMETER | 0.375 INCHES TRANSVERSELY THROUGH HUB, FIRST END |
| MOUNTING HOLE TYPE AND QUANTITY | 1 PLAIN TRANSVERSELY THROUGH HUB, FIRST END |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 1.374 INCHES FIRST END |
| NOMINAL DISTANCE FROM BORE CENTER TO KEYWAY BOTTOM | 0.549 INCHES BOTH ENDS |
| NOMINAL DISTANCE FROM END TO FIRST GROOVE | 0.500 INCHES FIRST END |
| NOMINAL DISTANCE FROM END TO SECOND GROOVE | 0.937 INCHES FIRST END |
| NOMINAL OUTSIDE DIAMETER | 4.062 INCHES |
| PITCH DIAMETER | 4.0000 INCHES NOMINAL |
| PRESSURE ANGLE | 20.0000 DEGREES |
| SECOND GROOVE NOMINAL DIAMETER | 0.755 INCHES FIRST END |
| SECOND GROOVE NOMINAL WIDTH | 0.031 INCHES FIRST END |
| SPECIAL FEATURES | COUNTERBORE ON 1ST END W/ 2.000 IN. DIA,0.125 IN. DEPTH |
| STYLE DESIGNATOR | PROTRUDING HUB |
| TEETH QUANTITY | 128 |
| TOOTH FORM | STANDARD |