| BEARING SURFACE TYPE | CHAMFERED |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| NUT HEIGHT | 0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-M-20693 MIL SPEC 2ND MATERIAL RESPONSE LOCKING INSERT |
| MATERIAL | PLASTIC POLYAMIDE LOCKING INSERT |
| MATERIAL | STEEL CORROSION RESISTING OVERALL EXCEPT INSERT |
| NOMINAL THREAD SIZE | 0.500 INCHES |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS |
| SPECIAL TEST FEATURES | SPECIAL QUALITY CONTROL TESTING |
| WIDTH ACROSS FLATS | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| SURFACE TREATMENT | PASSIVATE OVERALL EXCEPT INSERT |
| TEMP RATING | 250.0 FAHRENHEIT NOMINAL |
| TEST DATA DOCUMENT | 81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNC |
| THREAD QUANTITY PER INCH | 13 |