| BEARING SURFACE TYPE | UNFINISHED |
| HARDNESS RATING | 85.0 ROCKWELL B MINIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | HEX NUT |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM B446,GRADE 1 PER ASME B18.2.2 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | NICKEL ALLOY 625 OVERALL |
| NOMINAL THREAD SIZE | 0.375 INCHES |
| NUT HEIGHT | 0.210 INCHES MINIMUM AND 0.227 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| SPECIFICATION/STANDARD DATA | 81349-MIL-DTL-1222J GOVERNMENT SPECIFICATION |
| SPECIAL FEATURES | TENSILE STRENGTH RATED 120 MIN KSI; YIELD STRENGTH RATED 60 KSI MIN |
| WIDTH ACROSS FLATS | 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 16 |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |