| WASHER THICKNESS | 0.052 INCHES MINIMUM AND 0.062 INCHES MAXIMUM |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5640 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| WIDTH ACROSS FLATS | 0.428 INCHES MINIMUM AND 0.437 INCHES MAXIMUM |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | STEEL COMP 303 OVERALL OR STEEL COMP 303SE OVERALL OR STEEL COMP 303 PLUS X OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ES-091 FSCM 06848 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| THREAD CLASS | 3B |
| THREAD SERIES | UNF |
| WASHER OUTSIDE DIAMETER | 0.615 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| OVERALL HEIGHT | 0.396 INCHES MINIMUM AND 0.406 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 28 |
| SPECIAL FEATURES | TWO DRILLED HOLES LOCATED 180 DEG APART 0.043 IN. MIN 0.048 IN. MAX DIA 0.064 IN. MIN 0.074 IN. MAX FROM NUT HEX END |
| NOMINAL THREAD SIZE | 0.250 INCHES |