| MATERIAL | STEEL OVERALL |
| SURFACE TREATMENT | CHROMIUM OVERALL |
| STYLE DESIGNATOR | BOX END |
| OVERALL LENGTH | 3.000 INCHES NOMINAL |
| WRENCHING END OUTSIDE DIAMETER | 1.265 INCHES MAXIMUM |
| DRIVE END OUTSIDE DIAMETER | 1.055 INCHES MAXIMUM |
| WRENCHING END HEAD THICKNESS | 0.563 INCHES MAXIMUM |
| DRIVE END HEAD THICKNESS | 0.524 INCHES MAXIMUM |
| WRENCHING SURFACE SIZE | 0.875 INCHES NOMINAL SINGLE END |
| WRENCHING SURFACE SHAPE | SPLINE SINGLE END INTERNAL |
| WRENCHING SURFACE FLUTE QUANTITY | 12 |
| DRIVE SURFACE SIZE | 0.500 INCHES NOMINAL SINGLE END |
| DRIVE END SHAPE | SQUARE SINGLE END INTERNAL |
| SPECIAL FEATURES | NO. 28 SPLINE SIZE; OVERALL LENGTH IS CENTER TO CENTER LENGTH |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81349 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-W-8982 |