| CRITICALITY CODE JUSTIFICATION | FEAT |
| FASTENER LENGTH | 0.750 INCHES MINIMUM AND 0.770 INCHES MAXIMUM |
| FEATURES PROVIDED | FINISHED HEAD |
| HARDNESS RATING | 24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.730 INCHES MINIMUM AND 0.737 INCHES MAXIMUM |
| HEAD HEIGHT | 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM |
| HEAD STYLE | ROUND W/WRENCH FLATS |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MINIMUM TENSILE STRENGTH | 130000 POUNDS PER SQUARE INCH |
| MINIMUM YIELD STRENGTH | 85000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| SPECIAL FEATURES | TWO HOLES DRILLED THRU HEAD 0.098 IN. MIN 0.103 IN. MAX DIA FROM CENTER OF BOLT TO CENTER OF HOLES 0.260 IN.IF PART IS NOT MANUFACTURED CORRECTLY, IT COULD BECOME LOOSE DURING ENGINE OPERATION, DAMAGING ANYTHING IN OR DOWNSTREAM OF THE REAR FAN DUCT |
| WIDTH BETWEEN FLATS | 0.310 INCHES MINIMUM AND 0.330 INCHES MAXIMUM |
| SURFACE FINISH | 32.0 MICROINCHES THREADS |
| SURFACE FINISH | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.577 INCHES MINIMUM AND 0.680 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNJF |