| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN | 
| MATERIAL | STEEL CORROSION RESISTING OVERALL | 
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT - 6 POINT, CAPTIVE WASHER, SELF-LOCKING | 
| PROPRIETARY CHARACTERISTICS | PACS | 
| NOMINAL THREAD SIZE | 0.3125 INCHES | 
| NUT STYLE | HEXAGON | 
| OVERALL HEIGHT | 0.340 INCHES MAXIMUM | 
| SPECIAL FEATURES | WIDTH ACROSS POINTS 0.419" MIN; MATERIAL CRES A286 (UNS S66288); LUBRICANT COAT PER AS5272; APPLICATION TEMP 450 DEG F; FOR USE ON STANDARD TO 0.032 OVERSIZE SHANK TITANIUM BOLTS | 
| WASHER OUTSIDE DIAMETER | 0.560 INCHES MAXIMUM | 
| WASHER THICKNESS | 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM | 
| WIDTH ACROSS FLATS | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM | 
| SURFACE TREATMENT | PASSIVATE  AND DISULFIDE MOLYBDENUM OVERALL | 
| THREAD CLASS | 3B | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD QUANTITY PER INCH | 24 | 
| THREAD SERIES | UNJF |