| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 0.843 INCHES MINIMUM AND |
| 0.875 INCHES MAXIMUM |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35, TYPE VI OR VII. FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HEAD STYLE | PAN |
| HEAD DIAMETER | 0.2560 INCHES MINIMUM AND |
| 0.2700 INCHES MAXIMUM |
| HEAD HEIGHT | 0.0870 INCHES MINIMUM AND |
| 0.0970 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| WASHER QUANTITY | 1 |
| PRIMARY WASHER STYLE | FLAT |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.370 INCHES MINIMUM AND |
| 0.390 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.036 INCHES MINIMUM AND |
| 0.065 INCHES MAXIMUM |
| SPECIAL FEATURES | WASHER SHALL BE CAPTIVE ON SCREW, AND FREE TO TURN. |