| DRIVE SURFACE SIZE | 0.385 INCHES NOMINAL SECOND END |
| DRIVE END HEAD THICKNESS | 0.688 INCHES NOMINAL |
| DRIVE END OFFSET ANGLE | 0.0 DEGREES NOMINAL |
| DRIVE END OUTSIDE DIAMETER | 0.688 INCHES NOMINAL |
| DRIVE END SHAPE | SQUARE SECOND END INTERNAL |
| FUNCTIONAL DESCRIPTION | USED ON AIRCRAFT 9/16 CYL NUT |
| HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| MATERIAL | STEEL COMP 4150 OR STEEL COMP 4140 OVERALL |
| WRENCHING SURFACE SHAPE | 12 POINT FIRST END INTERNAL |
| WRENCHING SURFACE SIZE | 0.565 INCHES NOMINAL FIRST END |
| WRENCHING END HEAD THICKNESS | 0.630 INCHES NOMINAL |
| WRENCHING END OFFSET ANGLE | 42.0 DEGREES NOMINAL |
| WRENCHING END OUTSIDE DIAMETER | 0.730 INCHES NOMINAL |
| STYLE DESIGNATOR | OFFSET |