| ATTACHMENT METHOD | MOUNTING HOLE |
| BORE NOMINAL DIAMETER | 0.188 INCHES BOTH ENDS |
| BORE STYLE | PLAIN BOTH ENDS |
| HARDNESS RATING | 23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL |
| HUB NOMINAL DIAMETER | 0.250 INCHES FIRST END |
| HUB STYLE DESIGNATOR | PLAIN FIRST END |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763,CLASS 6,TYPE C FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 416 OVERALL |
| MOUNTING HOLE NOMINAL DIAMETER | 0.067 INCHES TRANSVERSELY THROUGH HUB FIRST END |
| MOUNTING HOLE NOMINAL THREAD SIZE | 0.112 INCHES TRANSVERSELY THROUGH HUB FIRST END |
| MOUNTING HOLE THREAD QUANTITY PER INCH | 40 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 PLAIN AND 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| PRESSURE ANGLE | 14.5000 DEGREES |
| STYLE DESIGNATOR | PROTRUDING HUB |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| TEETH QUANTITY | 18 |
| TOOTH FORM | STANDARD |