| HARDNESS RATING | 24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| OVERALL HEIGHT | 0.365 INCHES MAXIMUM |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| NUT STYLE | HEXAGON |
| WASHER OUTSIDE DIAMETER | 0.660 INCHES MINIMUM AND 0.680 INCHES MAXIMUM |
| WASHER THICKNESS | 0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.489 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 2B |
| THREAD SERIES | UNF |
| THREAD QUANTITY PER INCH | 24 |