| BEARING SURFACE TYPE | CHAMFERED |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-M-20693 MIL SPEC ALL MATERIAL RESPONSES LOCKING INSERT |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE NUT |
| MATERIAL | COPPER ALLOY 360 NUT |
| MATERIAL | PLASTIC POLYHEXAMETHYLENE AMIDE OR PLASTIC POLYCAPROLACTAM LOCKING INSERT |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT HEIGHT | 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.489 INCHES MINIMUM AND 0.503 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| SURFACE TREATMENT | CADMIUM OVERALL EXCEPT INSERT |
| TEMP RATING | 250.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNC |