| BEARING SURFACE TYPE | UNFINISHED |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | UNABLE TO DECODE |
| MATERIAL | UNABLE TO DECODE |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | HEX JAM NUT |
| NOMINAL THREAD SIZE | 0.750 INCHES |
| NUT HEIGHT | 0.398 INCHES MINIMUM AND 0.446 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| SPECIFICATION/STANDARD DATA | 81349-MIL-DTL-1222J GOVERNMENT SPECIFICATION |
| STRENGTH GRADE DESIGNATION | 8 |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 10 |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |
| SPECIAL FEATURES | TENSILE STRENGTH RATED 150-175 KSI |
| WIDTH ACROSS FLATS | 1.088 INCHES MINIMUM AND 1.125 INCHES MAXIMUM |