| COUNTERBORE DIAMETER | 0.294 INCHES MINIMUM AND 0.301 INCHES MAXIMUM BOSS |
| COUNTERSINK ANGLE | 45.0 DEGREES NOMINAL BOSS |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763,COND A FED SPEC ALL MATERIAL RESPONSES OR ASTM A2756 ASSN STD 1ST MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 302 OR STEEL COMP 303 OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT COUNTERBORE DEPTH | 0.303 INCHES MINIMUM AND 0.318 INCHES MAXIMUM BOSS |
| NUT DIAMETER | 0.497 INCHES MINIMUM AND 0.503 INCHES MAXIMUM |
| NUT HEIGHT | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM |
| NUT STYLE | CLINCH |
| PILOT LENGTH | 0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM |
| PILOT DIAMETER | 0.353 INCHES MINIMUM AND 0.356 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES | UNF |