| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | PLASTIC POLYAMIDE LOCKING INSERT |
| NICKEL ALLOY 400 OVERALL EXCEPT INSERT |
| NUT STYLE | HEXAGON |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| BEARING SURFACE TYPE | CHAMFERED OR |
| WASHER FACED |
| THREAD SERIES | UNJF |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3B |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-281,CLASS A FED SPEC 1ST MATERIAL RESPONSE OVERALL EXCEPT INSERT |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL EXCEPT INSERT |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| NUT HEIGHT | 0.266 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.492 INCHES MINIMUM AND |
| 0.502 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 88.0 DEGREES MINIMUM NUT |
| LUBRICATION | SOLUBLE LUBRICANT |
| TEMP RATING | 250.0 DEG FAHRENHEIT MAXIMUM |
| BEARING SURFACE FINISH | 125.0 MICROINCHES |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS21083B5 |