| FEATURES PROVIDED | CASEHARDENED |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | FREE-RUNNING ALL METAL DESIGN OR PREVAILING TORQUE ALL METAL DESIGN |
| OVERALL HEIGHT | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE OR QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 8740 OVERALL |
| NOMINAL THREAD SIZE | 0.438 INCHES |
| NUT STYLE | HEXAGON |
| SPECIAL FEATURES | 30 DEGREE CHAMFER ON EXTENDED WASHER |
| WASHER OUTSIDE DIAMETER | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM |
| WASHER THICKNESS | 0.095 INCHES MINIMUM AND 0.115 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.610 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNF |
| THREAD QUANTITY PER INCH | 20 |