| EFFECTIVE LENGTH | 1.350 INCHES MINIMUM AND 1.355 INCHES MAXIMUM |
| DIAMETER | 0.564 INCHES MINIMUM AND 0.566 INCHES MAXIMUM |
| DISTANCE FROM CENTERLINE TO FLAT | 0.340 INCHES NOMINAL |
| FIRST END STYLE | SQUARE |
| HEAD STYLE | DEE CHAMFER |
| HEIGHT | 0.090 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4130 OVERALL |
| PIN HEAD DIAMETER | 0.780 INCHES NOMINAL |
| SECOND UNDERCUT DIAMETER | 0.540 INCHES MINIMUM AND 0.545 INCHES MAXIMUM |
| SECOND UNDERCUT WIDTH | 0.090 INCHES NOMINAL |
| STYLE DESIGNATOR | GROOVE |
| UNDERCUT DIAMETER | 0.540 INCHES MINIMUM AND 0.545 INCHES MAXIMUM |
| UNDERCUT WIDTH | 0.039 INCHES MINIMUM AND 0.042 INCHES MAXIMUM |
| UNDER HEAD LENGTH | 1.460 INCHES NOMINAL |