| FASTENER LENGTH | 0.5275 INCHES MINIMUM AND 0.7185 INCHES MAXIMUM |
| HEAD HEIGHT | 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5731 INTERNATIONAL STD/SPEC ALL MATERIAL RESPONSES OR AMS5732 INTERNATIONAL STD/SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD DIAMETER | 0.3125 INCHES |
| SINGLE SHEAR STRENGTH | 160000 POUNDS PER SQUARE INCH (PSI) |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, HEX HEAD, CRUCIFORM RECESS, FULL THREAD, A286 CRES, 160 KSI FTU |
| SPECIAL FEATURES | UNDRILLED HEAD. MATERIAL - CRES: A286 (UNS S66286) CONFORMING TO THE CHEMISTRY OF AMS5731, AMS5732, AMS5737 OR AMS5853. FINISH - PASSIVATE PER AMS2700 METHOD 1, TYPE 2 OR 8, CLASS 4. HEAT TREATMENT: AMS2759; 160 TO 190 KSI FTU |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| WIDTH BETWEEN FLATS | 0.429 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS1802 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS2700 METHOD 1, TYPE 2 OR 8, CLASS 4 INTERNATIONAL STD/SPEC ALL TREATMENT RESPONSES OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.4635 INCHES MINIMUM AND 0.6865 INCHES MAXIMUM |