| COUNTERSINK ANGLE | 88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM NUT |
| FEATURES PROVIDED | CASEHARDENED |
| HARDNESS RATING | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| OVERALL HEIGHT | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4340 OVERALL |
| NOMINAL THREAD SIZE | 0.938 INCHES |
| NUT STYLE | HEXAGON |
| WASHER OUTSIDE DIAMETER | 1.270 INCHES MINIMUM AND 1.280 INCHES MAXIMUM |
| WASHER THICKNESS | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 1.115 INCHES MINIMUM AND 1.125 INCHES MAXIMUM |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNEF |