| BEARING SURFACE FINISH | 125.0 MICROINCHES |
| BEARING SURFACE TYPE | CHAMFERED |
| HARDNESS RATING | 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6280 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6304 ASSN STD 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 3RD MATERIAL RESPONSE OR AMS 6485 ASSN STD 4TH MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 8630 OR STEEL COMP 601 OR STEEL COMP 8740 OR STEEL COMP H11 OVERALL |
| NOMINAL THREAD SIZE | 0.438 INCHES |
| NUT HEIGHT | 0.373 INCHES MAXIMUM |
| NUT STYLE | DOUBLE HEXAGON |
| WIDTH ACROSS FLATS | 0.679 INCHES MINIMUM AND 0.690 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 | 20 |
| THREAD SERIES | UNJF |