| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | PLASTIC POLYAMIDE LOCKING INSERT |
| STEEL NUT |
| NUT STYLE | HEXAGON |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| BEARING SURFACE TYPE | CHAMFERED OR |
| WASHER FACED |
| THREAD SERIES | UNC |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3B |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE-J995, GRADE 5 OR 8 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| SURFACE TREATMENT | CADMIUM AND |
| ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM-B633, TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| NUT HEIGHT | 0.298 INCHES MINIMUM AND |
| 0.328 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.428 INCHES MINIMUM AND |
| 0.439 INCHES MAXIMUM |
| TEMP RATING | 250.0 DEG FAHRENHEIT NOMINAL |
| BEARING SURFACE FINISH | 125.0 MICROINCHES |
| SPEC/STD CONTROLLING DATA | |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-DTL-45913/3 |
| MANUFACTURERS CODE | 81349 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | M45913/3-4CG5Z |