| HARDNESS RATING | 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 8740 OVERALL |
| NOMINAL THREAD SIZE | 0.438 INCHES |
| NUT STYLE | CLINCH |
| NUT HEIGHT | 0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM |
| PILOT DIAMETER | 0.550 INCHES MINIMUM AND 0.560 INCHES MAXIMUM |
| SPECIAL FEATURES | TWO GROOVES 0.031 IN. MIN,0.062 IN. MAX RADIUS |
| WIDTH ACROSS FLATS | 0.616 INCHES MINIMUM AND 0.627 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3B |
| THREAD SERIES | UNF |
| THREAD QUANTITY PER INCH | 20 |