| FASTENER LENGTH | 1.171 INCHES MINIMUM AND 1.203 INCHES MAXIMUM |
| HARDNESS RATING | 25.0 ROCKWELL C MINIMUM OVERALL AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.214 INCHES MINIMUM AND 0.286 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| MATERIAL | COPPER ALLOY OVERALL OR STEEL COMP 302 OVERALL |
| PRIMARY WASHER MATERIAL THICKNESS | 0.078 INCHES NOMINAL |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.298 INCHES NOMINAL |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.983 INCHES MINIMUM AND 1.015 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 18 |
| THREAD SERIES DESIGNATOR | UNC |
| WASHER QUANTITY | 1 |
| WIDTH BETWEEN FLATS | 0.612 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |