| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | STEEL NUT |
| NUT STYLE | HEXAGON |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| BEARING SURFACE TYPE | CHAMFERED |
| THREAD SERIES | UNF |
| NOMINAL THREAD SIZE | 0.437 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 2B |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE J995 GRADE 5 INTERNATIONAL STD/SPEC SINGLE MATERIAL RESPONSE NUT |
| SURFACE TREATMENT | ZINC NUT |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B633 TYPE II, FE/ZN 8 ASSN STD SINGLE TREATMENT RESPONSE NUT |
| NUT HEIGHT | 0.438 INCHES MINIMUM AND |
| 0.468 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.616 INCHES MINIMUM AND |
| 0.627 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 81349-MIL-DTL-45913/1A GOVERNMENT SPECIFICATION |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81349 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | M45913/1-7FG5Z |