| HARDNESS RATING | HRC 37-45 |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 OR AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| NUT HEIGHT | 0.345 INCHES MINIMUM AND 0.360 INCHES MAXIMUM |
| NUT STYLE | DOUBLE HEXAGON |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT,SELF-LOCKING, 12 POINT, REDUCED HEIGHT,SILVER PLATE |
| SPECIAL FEATURES | FINISH: SILVER PLATE PER AMS 2411, SILVER PLATE ONLY ON THE THREADS WITH OPTIONAL COVERAGE ON COUNTERSINK; DIMENTIONS APPLY AFTER PLATING. UPPER THREADED PORTION DEFORMED FOR LOCKING FEATURE, TOOL MARKS AND DISTORTION ARE PERMISSIBLE IN LOCKING AREA |
| WIDTH ACROSS FLATS | 0.515 INCHES NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2411 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| THREAD CLASS | 3B |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES | UNJF |