| BEARING SURFACE TYPE | CHAMFERED |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| LUBRICATION | SOLUBLE LUBRICANT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5640 ASSN STD ALL MATERIAL RESPONSES NUT |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-M-20693 COMP A TYPE 1 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-M-20693 COMP B TYPE @4 AND 4A MIL SPEC 2ND MATERIAL RESPONSE LOCKING INSERT |
| MATERIAL | PLASTIC POLYHEXAMETHYLENE AMIDE OR PLASTIC POLYCAPROLACTAM LOCKING INSERT |
| MATERIAL | STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 303 PLUS X NUT |
| III BEARING SURFACE FINISH | 125.0 MICROINCHES |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT HEIGHT | 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| SURFACE TREATMENT | PASSIVATE OVERALL EXCEPT INSERT |
| TEMP RATING | 250.0 DEG FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNC |