| ATTACHMENT METHOD | MOUNTING HOLE |
| BODY STYLE | WEBBED, WITH LIGHTENING HOLES |
| BORE NOMINAL DIAMETER | 3.000 INCHES BOTH ENDS |
| BORE STYLE | W/ KEYWAY BOTH ENDS |
| FACE NOMINAL WIDTH | 3.000 INCHES |
| FIRST GROOVE NOMINAL DIAMETER | 4.250 INCHES FIRST END |
| FIRST GROOVE NOMINAL WIDTH | 0.125 INCHES FIRST END |
| HARDNESS RATING | 92.0 ROCKWELL B NOMINAL OVERALL |
| HELIX ANGLE | 14.9167 DEGREES |
| HUB NOMINAL DIAMETER | 4.500 INCHES FIRST END |
| HUB NOMINAL DIAMETER | 4.500 INCHES SECOND END |
| HUB STYLE DESIGNATOR | 1 GROOVE FIRST END |
| HUB STYLE DESIGNATOR | PLAIN SECOND END |
| KEYWAY NOMINAL WIDTH | 0.749 INCHES BOTH ENDS |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-890,ALLOY NO. 3 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| PITCH DIAMETER | 16.4000 INCHES NOMINAL |
| PRESSURE ANGLE | 20.0000 DEGREES |
| MOUNTING HOLE NOMINAL THREAD SIZE | 0.500 INCHES TRANSVERSELY THROUGH HUB FIRST END |
| MOUNTING HOLE THREAD QUANTITY PER INCH | 13 TRANSVERSELY THROUGH HUB FIRST END |
| MOUNTING HOLE THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| MOUNTING HOLE TYPE AND QUANTITY | 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| NOMINAL DISTANCE BETWEEN BODY FACE AND RECESSED HUB END | 0.257 INCHES BOTH ENDS |
| NOMINAL DISTANCE FROM BORE CENTER TO KEYWAY BOTTOM | 1.7135 INCHES BOTH ENDS |
| NOMINAL DISTANCE FROM END TO FIRST GROOVE | 0.375 INCHES FIRST END |
| NOMINAL OUTSIDE DIAMETER | 16.6830 INCHES |
| SPECIAL FEATURES | BORE CHAMFERED BOTH ENDS 1/16 IN. BY 45 DEG |
| STYLE DESIGNATOR | RECESSED HUBS |
| TEETH TYPE | SINGLE HELIX |
| TEETH QUANTITY | 82 |
| TOOTH DIRECTION | RIGHT |
| TOOTH FORM | STANDARD |