| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | STEEL COMP 8740 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 4130 OR |
| STEEL COMP 1040 OR |
| STEEL COMP 1042 OR |
| STEEL COMP 1050 NUT |
| NUT STYLE | HEXAGON |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| BEARING SURFACE TYPE | CHAMFERED OR |
| WASHER FACED |
| THREAD SERIES | UNJF |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3B |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6040 MIL SPEC 1ST MATERIAL RESPONSE OR |
| AMS 6378 ASSN STD 2ND MATERIAL RESPONSE OR |
| AMS 6350 ASSN STD 3RD MATERIAL RESPONSE OR |
| SAE ASSN STD 4TH MATERIAL RESPONSE OR |
| SAE ASSN STD 5TH MATERIAL RESPONSE OR |
| SAE ASSN STD 6TH MATERIAL RESPONSE NUT |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND |
| 44.0 ROCKWELL C MAXIMUM |
| NUT HEIGHT | 0.268 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.492 INCHES MINIMUM AND |
| 0.502 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 120.0 DEGREES NOMINAL NUT |
| LUBRICATION | DRY FILM LUBRICANT |
| TEMP RATING | 450.0 DEG FAHRENHEIT NOMINAL |
| SPECIFICATION/STANDARD DATA | 81205-BACN10JC MANUFACTURERS STANDARD |