| COUNTERSINK ANGLE | 90.0 DEGREES NOMINAL NUT |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | FREE-RUNNING ALL METAL DESIGN OR PREVAILING TORQUE ALL METAL DESIGN |
| OVERALL HEIGHT | 0.490 INCHES MINIMUM AND 0.510 INCHES 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 | HEXAGON |
| SPECIAL FEATURES | SLOTTED |
| WASHER OUTSIDE DIAMETER | 0.710 INCHES MINIMUM AND 0.730 INCHES MAXIMUM |
| WASHER THICKNESS | 0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.556 INCHES MINIMUM AND 0.563 INCHES MAXIMUM |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNF |
| THREAD QUANTITY PER INCH | 20 |