| FASTENER LENGTH | 0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM |
| HARDNESS RATING | 30.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.208 INCHES MINIMUM AND 0.230 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 1022 OR STEEL COMP 1050 OVERALL |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.567 INCHES MINIMUM AND 0.590 INCHES MAXIMUM |
| WASHER QUANTITY | 1 |
| WIDTH BETWEEN FLATS | 0.491 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.685 INCHES MINIMUM AND 0.753 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 18 |
| THREAD SERIES DESIGNATOR | UNC |