| BEARING SURFACE TYPE | CHAMFERED |
| COUNTERSINK ANGLE | 25.0 DEGREES MINIMUM AND 35.0 DEGREES MAXIMUM OVERALL |
| LOCKING FEATURE | PREVAILING TORQUEPREVAILING TORQUE |
| LUBRICATION | DRY FILM LUBRICANTDRY FILM LUBRICANT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5640 AEROSPACE MATERIAL SPEC STD 1ST MATERIAL RESPONSE OR TYPE XM-7 OR 18-9LW PER ASTM A493 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) 2ND MATERIAL RESPONSE OR AMS5647 AEROSPACE MATERIAL SPEC STD 3RD MATERIAL RESPONSE OR AMS5686 AEROSPACE MATERIAL SPEC STD 4TH MATERIAL RESPONSE OR TYPE X-21 PER ASTM A276 OR A286 PER AMS5732 OR AMS5737 NATIONAL STD/SPEC 5TH MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 303 OR STEEL COMP XM-7 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD SIZE | 0.1640 INCHES0.1640 INCHES |
| NUT HEIGHT | 0.219 INCHES MINIMUM AND 0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM0.250 INCHES MAXIMUM |
| NUT STYLE | HEXAGONHEXAGON |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT,SELF-LOCKING,HEXAGON,REGULAR HEIGHT,450 F,125 KSI FTU |
| SPECIFICATION/STANDARD DATA | 80205-NAS-21045 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| WIDTH ACROSS FLATS | 0.336 INCHES MINIMUM AND 0.336 INCHES MINIMUM AND 0.345 INCHES MAXIMUM0.345 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS2700,METHOD 1,CLASS 4 BEFORE DRY FILM LUBRICANT IAW AS5272 TYPE I NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT NOMINAL450.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B3B |
| THREAD DIRECTION | RIGHT-HANDRIGHT-HAND |
| THREAD QUANTITY PER INCH | 3232 |
| THREAD SERIES | UNJCUNJC |