| BEARING SURFACE TYPE | CHAMFERED OR WASHER FACED |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| NUT HEIGHT | 0.219 INCHES MINIMUM AND 0.281 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-M-20693,COMP A,TY 1 MIL SPEC SINGLE MATERIAL RESPONSE LOCKING INSERT |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-281,CL A FED SPEC 1ST MATERIAL RESPONSE OR QQ-N-281,CL B FED SPEC 2ND MATERIAL RESPONSE NUT |
| MATERIAL | NICKEL ALLOY 400 OR NICKEL ALLOY R-405 NUT |
| MATERIAL | PLASTIC POLYHEXAMETHYLENE AMIDE LOCKING INSERT |
| NOMINAL THREAD SIZE | 0.164 INCHES |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |
| WIDTH ACROSS FLATS | 0.336 INCHES MINIMUM AND 0.347 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-81751,TY1,CL 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CERAMIC OVERALL |