| BEARING SURFACE FINISH | 125.0 MICROINCHES |
| BEARING SURFACE TYPE | FLAT |
| LUBRICATION | DRY FILM LUBRICANT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5659 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT |
| MATERIAL | STEEL COMP XM-12 OVERALL |
| NOMINAL THREAD SIZE | 4.250 INCHES |
| NUT HEIGHT | 0.500 INCHES NOMINAL |
| NUT STYLE | HEXAGON |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | ITEM IS FAA CERTIFIED |
| SPECIAL FEATURES | O'LEVEL ATA-55; HT TR 180-200 KSI PER BAC5619; SOLID FILM LUBRICANT PER BAC5811 TYPE VI CLASS 1 ON THREADS; MAGNETIC PARTICLE INSPECT PER BAC5424, CLASS B |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | F-17.09 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CHROMATE OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 12 |
| THREAD SERIES | UNIFIED NATIONAL JOINT (UNJ) |
| WIDTH ACROSS FLATS | 5.000 INCHES NOMINAL |