| HEAD DIAMETER | 1.479 INCHES MINIMUM AND 1.500 INCHES MAXIMUM |
| HEAD HEIGHT | 0.988 INCHES MINIMUM AND 1.000 INCHES MAXIMUM |
| HEAD STYLE | FLAT CHAMFER |
| NOMINAL THREAD DIAMETER | 1.000 INCHES |
| NONDEFINITIVE SPEC/STD DATA | 6 TYPE |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| MINIMUM YIELD STRENGTH | 130000 POUNDS PER SQUARE INCH |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| SPECIAL FEATURES | KNURLED HEAD |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 3.000 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 8 |
| THREAD SERIES DESIGNATOR | UNC |
| WIDTH ACROSS FLATS | 0.750 INCHES MINIMUM AND 0.757 INCHES MAXIMUM |
| SURFACE FINISH | 125.0 MICROINCHES OVERALL |
| DEPARTURE FROM CITED DESIGNATOR | AS MODIFIED BY THREAD CLASS |
| FASTENER LENGTH | 4.000 INCHES NOMINAL |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM OVERALL AND 43.0 ROCKWELL C MAXIMUM OVERALL |