| DISTANCE FROM MOUNTING HOLE CENTER TO END | 0.750 INCHES NOMINAL AND 2.000 INCHES NOMINAL |
| COUNTERBORE DEPTH | 0.500 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| COUNTERBORE DIAMETER | 0.780 INCHES MINIMUM AND 0.790 INCHES MAXIMUM |
| FIRST FLAT LENGTH | 3.500 INCHES NOMINAL |
| FLAT HEIGHT | 0.062 INCHES MINIMUM AND 0.063 INCHES MAXIMUM |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| OVERALL HEIGHT | 1.570 INCHES MINIMUM AND 1.580 INCHES MAXIMUM |
| OVERALL LENGTH | 4.490 INCHES MINIMUM AND 4.500 INCHES MAXIMUM |
| OVERALL WIDTH | 1.246 INCHES MINIMUM AND 1.248 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A331 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A322 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A331 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP 8740 OVERALL |
| MOUNTING HOLE DEPTH | 0.630 INCHES NOMINAL |
| MOUNTING HOLE DIAMETER | 0.531 INCHES MINIMUM AND 0.541 INCHES MAXIMUM |
| MOUNTING HOLE TYPE AND QUANTITY | 2 UNTHREADED-COUNTERBORED |
| STARTING EDGE SHAPE | STRAIGHT |
| STYLE DESIGNATOR | STEPPED |
| SURFACE TREATMENT | PHOSPHATE OVERALL |