| THREAD SERIES | UNJF |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | STEEL COMP 8740 OR |
| STEEL COMP E4340 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR |
| MIL-S-5000 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND |
| 40.0 ROCKWELL C MAXIMUM |
| NUT STYLE | SINGLE BALL SEAT, DOUBLE HEXAGON |
| BALL SEAT RADIUS | 0.375 INCHES MINIMUM AND |
| 0.380 INCHES MAXIMUM |
| NUT HEIGHT | 0.428 INCHES MINIMUM AND |
| 0.438 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.367 INCHES MINIMUM AND |
| 0.376 INCHES MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| TEMP RATING | 450.0 DEG FAHRENHEIT MAXIMUM |
| SPECIAL FEATURES | FURNISHED WITH A RECESSED WASHER |
| SPECIFICATION/STANDARD DATA | 80205-NAS1727 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |