| BEARING SURFACE TYPE | CHAMFERED OR WASHER FACED |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| NUT HEIGHT | 0.258 INCHES MINIMUM AND 0.359 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| MATERIAL | PLASTIC POLYAMIDE LOCKING INSERT |
| MATERIAL | STEEL NUT |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| SPECIAL FEATURES | FINISH COLOR BRONZE OR OLIVE DRAB |
| WIDTH ACROSS FLATS | 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE NUT |
| SURFACE TREATMENT | ZINC AND CHROMATE NUT |
| TEMP RATING | 250.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNF |
| THREAD QUANTITY PER INCH | 24 |