| COLOR | BLACK OVERALL |
| FASTENER LENGTH | 3.344 INCHES NOMINAL |
| HARDNESS RATING | 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.084 INCHES NOMINAL |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A193,B7 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 4145 OVERALL |
| MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
| MINIMUM YIELD STRENGTH | 105000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.688 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.126 INCHES MINIMUM AND 0.131 INCHES MAXIMUM |
| PRIMARY WASHER OUTSIDE DIAMETER | 1.549 INCHES MINIMUM AND 1.554 INCHES MAXIMUM |
| PRIMARY WASHER STYLE | SPRING TENSION |
| WASHER QUANTITY | 6 |
| WIDTH BETWEEN FLATS | 1.062 INCHES NOMINAL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 2A |
| THREAD LENGTH | 0.812 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNS |
| THREAD QUANTITY PER INCH | 11 |