| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 2.453 INCHES MINIMUM AND |
| 2.500 INCHES MAXIMUM |
| MATERIAL | IRON ALLOY 660 OVERALL |
| THREAD LENGTH | 2.393 INCHES MINIMUM AND |
| 2.470 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND |
| 40.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| HEAD HEIGHT | 0.219 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.428 INCHES MINIMUM AND |
| 0.440 INCHES MAXIMUM |
| HOLE CONFIGURATION STYLE | HEXAGON CORNERS |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 3 |
| HOLE DIAMETER | 0.070 INCHES MINIMUM AND |
| 0.080 INCHES MAXIMUM |
| FEATURES PROVIDED | FINISHED HEAD |
| SPECIFICATION/STANDARD DATA | 80205-NAS564 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,MACHINE |