| DEPARTURE FROM CITED DESIGNATOR | AS MOD BY PITCH DIA |
| FLUTE QUANTITY | 6 |
| LENGTH | 0.938 INCHES MINIMUM AND 1.062 INCHES MAXIMUM SQUARE END |
| OVERALL LENGTH | 3.938 INCHES MINIMUM AND 4.062 INCHES MAXIMUM |
| MATERIAL | STEEL OVERALL |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND C SERIES AND B STYLE |
| SHANK DIAMETER | 1.019 INCHES MINIMUM AND 1.021 INCHES MAXIMUM |
| STARTING CHAMFER TYPE | PLUG |
| STYLE DESIGNATOR | STRAIGHT FLUTE |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD FORMING METHOD | GROUND |
| THREAD LENGTH | 1.406 INCHES MINIMUM AND 1.594 INCHES MAXIMUM |
| THREAD PITCH DIAMETERS | +1.2293 TO 1.2298 INCHES |
| THREAD SIZE AND SERIES/TYPE DESIGNATOR | 1.250-20 UNS |
| THREAD STRUCTURE | REGULAR |
| WIDTH ACROSS FLATS | 0.758 INCHES MINIMUM AND 0.766 INCHES MAXIMUM |