| THREAD SERIES | UNC |
| NOMINAL THREAD SIZE | 0.164 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | PLASTIC POLYHEXAMETHYLENE AMIDE OR |
| PLASTIC POLYCAPROLACTAM LOCKING INSERT |
| STEEL COMP 303 OR |
| STEEL COMP 303SE OR |
| STEEL COMP 303 PLUS X NUT |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-M-20693 MIL SPEC 1ST MATERIAL RESPONSE LOCKING INSERT |
| AM 5640 ASSN STD 2ND MATERIAL RESPONSE NUT |
| SURFACE TREATMENT | PASSIVATE OVERALL EXCEPT INSERT |
| NUT STYLE | CLINCH |
| PILOT DIAMETER | 0.273 INCHES MINIMUM AND |
| 0.277 INCHES MAXIMUM |
| PILOT LENGTH | 0.129 INCHES MINIMUM AND |
| 0.141 INCHES MAXIMUM |
| NUT HEIGHT | 0.379 INCHES MINIMUM AND |
| 0.391 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.375 INCHES NOMINAL |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| NUT COUNTERBORE DEPTH | 0.135 INCHES NOMINAL NUT |
| COUNTERBORE DIAMETER | 0.220 INCHES NOMINAL NUT |
| LUBRICATION | SOLUBLE LUBRICANT |
| TEMP RATING | 250.0 DEG FAHRENHEIT NOMINAL |
| SPEC/STD CONTROLLING DATA | |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-N-45938/8 |
| MANUFACTURERS CODE | 81349 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | M45938/8-34C |