| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | PLASTIC POLYAMIDE LOCKING INSERT |
| STEEL NUT |
| NUT STYLE | HEXAGON |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN OR |
| PREVAILING TORQUE WITH NONMETALLIC INSERT |
| BEARING SURFACE TYPE | CHAMFERED OR |
| WASHER FACED |
| THREAD SERIES | UNF |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3B |
| SURFACE TREATMENT | PHOSPHATE OVERALL EXCEPT INSERT |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-P-16232 TY 2 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND |
| 35.0 ROCKWELL C MAXIMUM |
| NUT HEIGHT | 0.359 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.489 INCHES MINIMUM AND |
| 0.502 INCHES MAXIMUM |
| TEMP RATING | 250.0 DEG FAHRENHEIT NOMINAL |
| BEARING SURFACE FINISH | 110.0 MICROINCHES |
| SPEC/STD CONTROLLING DATA | |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-DTL-45913 |
| MANUFACTURERS CODE | 81349 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | M45913/3-5FG8P |