| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | STEEL PROPERTY CLASS 8.8 OVERALL EXCEPT INSERT |
| NUT STYLE | HEXAGON |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| BEARING SURFACE TYPE | CHAMFERED |
| THREAD SERIES | UNC |
| NOMINAL THREAD SIZE | 0.625 INCHES |
| THREAD QUANTITY PER INCH | 11 |
| THREAD CLASS | 3B |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE J995 ASSN STD SINGLE MATERIAL RESPONSE OVERALL EXCEPT INSERT |
| SURFACE TREATMENT | ZINC OVERALL EXCEPT INSERT |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B633 TY II. FE/ZN 8 ASSN STD SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND |
| 35.0 ROCKWELL C MAXIMUM |
| NUT HEIGHT | 0.735 INCHES MINIMUM AND |
| 0.765 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.922 INCHES MINIMUM AND |
| 0.940 INCHES MAXIMUM |
| TEMP RATING | 250.0 DEG FAHRENHEIT NOMINAL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT, SELF-LOCKING, HEXAGON NON-METALLIC LOCKING FEATURE, UNC-3B |
| SPEC/STD CONTROLLING DATA | |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-DTL-45913 |
| MANUFACTURERS CODE | 81349 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | M45913/3-10CG8Z |