| FASTENER LENGTH | 0.650 INCHES MINIMUM AND 0.690 INCHES MAXIMUM |
| GRIP DIAMETER | 0.2465 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
| GRIP LENGTH | 0.100 INCHES NOMINAL |
| HARDNESS RATING | 255.0 BRINELL STANDARD MINIMUM AND 321.0 BRINELL STANDARD MAXIMUM |
| HEAD HEIGHT | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| HOLE DIAMETER | 0.070 INCHES NOMINAL |
| HOLE QUANTITY | 2 |
| HOLE TYPE | DRILLED |
| MATERIAL DOCUMENT AND CLASSIFICATION | NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE BS S80 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 127680 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| WIDTH BETWEEN FLATS | 0.429 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.550 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNF |