| DIAMETER | 0.2511 INCHES MINIMUM AND 0.2515 INCHES MAXIMUM |
| FIRST END STYLE | CHAMFERED |
| FIRST END TAPER ANGLE | 40.0 DEGREES MINIMUM AND 50.0 DEGREES MAXIMUM |
| FIRST END TAPER LENGTH | 0.024 INCHES MINIMUM AND 0.039 INCHES MAXIMUM |
| HEAD STYLE | FLAT |
| HEIGHT | 0.123 INCHES MINIMUM AND 0.127 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4340 OR STEEL COMP 4140 OVERALL |
| PIN HEAD DIAMETER | 0.651 INCHES MINIMUM AND 0.661 INCHES MAXIMUM |
| STYLE DESIGNATOR | GROOVE |
| UNDER HEAD LENGTH | 0.349 INCHES MINIMUM AND 0.369 INCHES MAXIMUM |
| UNDERCUT DIAMETER | 0.220 INCHES MINIMUM AND 0.240 INCHES MAXIMUM |
| UNDERCUT RADIUS | 0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM |