| BEARING SURFACE TYPE | UNFINISHED |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | HEAVY HEX NUT |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM F467 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OR QQ-N-281, CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | NICKEL ALLOY 400 OVERALL |
| NOMINAL THREAD SIZE | 0.625 INCHES |
| NUT HEIGHT | 0.710 INCHES MINIMUM AND 0.758 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| SPECIFICATION/STANDARD DATA | 81349-MIL-DTL-1222J GOVERNMENT SPECIFICATION |
| SPECIAL FEATURES | TENSILE STRENGTH RATED 80-110 KSI; YIELD STRENGTH RATED 40 KSI MIN |
| WIDTH ACROSS FLATS | 1.031 INCHES MINIMUM AND 1.062 INCHES MAXIMUM |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 11 |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |