| BEARING SURFACE TYPE | FLAT |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | FINISHED HEXAGON NUT |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE J995, GRADE 5 STEEL ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD SIZE | 0.625 INCHES |
| NUT HEIGHT | 0.535 INCHES MINIMUM AND 0.559 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| SPECIAL FEATURES | METRIC DIMENSIONS: 15.88 MM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM F1941, FE/ZN 3AT ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 11 |
| THREAD TOLERANCE CLASS | 2B INTERNAL |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |
| WIDTH ACROSS FLATS | 0.092 INCHES MINIMUM AND 0.094 INCHES MAXIMUM |