| COLLAR INSIDE DIAMETER | 0.268 INCHES MINIMUM AND 0.272 INCHES MAXIMUM |
| COLLAR OUTSIDE DIAMETER | 0.418 INCHES MINIMUM AND 0.422 INCHES MAXIMUM |
| COLLAR OVERALL HEIGHT | 0.552 INCHES NOMINAL |
| COLLAR STYLE | THREADED (BREAK OFF) TYPE |
| LUBRICATION | SOLID FILM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5643 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | COLLAR, PRELOAD, TENSION 17-4PH CORROSION RESISTANT STEEL |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.2500 INCHES |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | ITEM IS FAA CERTIFIED |
| SPECIAL FEATURES | O'LEVEL ATA-54; WIDTH ACROSS FLATS 0.425 IN. MIN 0.440 IN. MAX; TORQUE OFF INCH-POUNDS 105-130 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2700 METHOD 1 TYPE 2 OR TYPE 8 CLASS 1 FED STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNJF |