| BEARING SURFACE TYPE | CHAMFERED OR WASHER FACED |
| COUNTERSINK ANGLE | 120.0 DEGREES NOMINAL NUT |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| 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 |
| 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 |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| NUT HEIGHT | 0.268 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| SPECIFICATION/STANDARD DATA | 81205-BACN10JC MANUFACTURERS STANDARD |
| WIDTH ACROSS FLATS | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |