| THREAD SERIES | UNJF |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR |
| 1M25732 ASSN STD SINGLE MATERIAL RESPONSE OR |
| 1MS5737 ASSN STD SINGLE MATERIAL RESPONSE OR |
| 1MS5853 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS-QQ-P-416, TYPE II, CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| NUT STYLE | DOUBLE HEXAGON |
| NUT HEIGHT | 0.204 INCHES MINIMUM AND |
| 0.219 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.305 INCHES MINIMUM AND |
| 0.313 INCHES MAXIMUM |
| BEARING SURFACE TYPE | WASHER FACED |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| TEMP RATING | 450.0 DEG FAHRENHEIT MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT,SELF-LOCKING, 12 POINT, A286 CRES, LOW HEIGHT, 160 KSI FTU, 450 DEG. F |