| COUNTERBORE DIAMETER | 0.840 INCHES MINIMUM AND 0.845 INCHES MAXIMUM NUT |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| OVERALL HEIGHT | 0.670 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE NUT |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 NUT |
| MATERIAL | STEEL WASHER |
| NOMINAL THREAD SIZE | 0.750 INCHES |
| NUT COUNTERBORE DEPTH | 0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM NUT |
| NUT STYLE | FLAT WITH TURNED UP EDGE |
| SPECIAL FEATURES | ROCKWELL C SCALE 40 MIN AND ROCKWELL C SCALE 45 MAX WASHER |
| WASHER OUTSIDE DIAMETER | 1.310 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 16 |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |