| DIAMETER | 0.1865 INCHES MINIMUM AND 0.1868 INCHES MAXIMUM |
| FIRST END STYLE | SQUARE |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD STYLE | HEXAGON |
| HEIGHT | 0.089 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 630 OVERALL |
| SPECIAL FEATURES | 4-40UNC-2B X 0.250 IN. HOLE IN BOTTOM OF SHANK END |
| WIDTH ACROSS FLATS | 0.250 INCHES NOMINAL |
| STYLE DESIGNATOR | GROOVE |
| SURFACE FINISH | 32.0 MICROINCHES OUTSIDE DIAMETER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 TY1 OR TY2 OR TY3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| UNDERCUT DIAMETER | 0.156 INCHES NOMINAL |
| UNDER HEAD LENGTH | 0.658 INCHES MINIMUM AND 0.664 INCHES MAXIMUM |
| UNDERCUT WIDTH | 0.062 INCHES NOMINAL |