| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| OVERALL HEIGHT | 0.380 INCHES MINIMUM AND 0.400 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6414 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4340 OVERALL |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| NUT STYLE | CASTELLATED HEXAGON |
| WASHER OUTSIDE DIAMETER | 0.560 INCHES MINIMUM AND 0.570 INCHES MAXIMUM |
| WASHER THICKNESS | 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |