| FLUTE QUANTITY | 8 |
| OVERALL LENGTH | 4.938 INCHES MINIMUM AND 5.062 INCHES MAXIMUM |
| MATERIAL AND LOCATION | STEEL, HIGH SPEED OVERALL |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND D SERIES AND A STYLE |
| SHANK DIAMETER | 1.302 INCHES MINIMUM AND 1.305 INCHES MAXIMUM |
| SQUARE END LENGTH | 1.063 INCHES MINIMUM AND 1.187 INCHES MAXIMUM |
| STARTING CHAMFER TYPE | TAPER |
| WIDTH ACROSS FLATS | 0.971 INCHES MINIMUM AND 0.979 INCHES MAXIMUM |
| STYLE DESIGNATOR | STRAIGHT FLUTE |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD FORMING METHOD | GROUND |
| THREAD LENGTH | 1.875 INCHES MINIMUM AND 2.125 INCHES MAXIMUM |
| THREAD PITCH DIAMETERS | +1.5894 TO 1.5909 INCHES |
| THREAD STRUCTURE | REGULAR |
| THREAD SIZE AND SERIES/TYPE DESIGNATOR | 1.625-18 UNEF |