| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.2500 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.370 INCHES NOMINAL |
| FASTENER LENGTH | 0.730 INCHES MINIMUM AND |
| 0.760 INCHES MAXIMUM |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5731,AMS5732,AMS5737,OR AMS5853 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | ALUMINUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | NAS4006 NATIONAL STD SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| HEAD STYLE | DISHED HEXAGON |
| HEAD HEIGHT | 0.125 INCHES MINIMUM AND |
| 0.140 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.429 INCHES MINIMUM AND |
| 0.439 INCHES MAXIMUM |
| GRIP LENGTH | 0.365 INCHES MINIMUM AND |
| 0.385 INCHES MAXIMUM |
| GRIP DIAMETER | 0.2797 INCHES MINIMUM AND |
| 0.2807 INCHES MAXIMUM |
| SURFACE FINISH | 125.0 MICROINCHES OVERALL |
| 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| SPECIFICATION/STANDARD DATA | 80205-NAS6303 THRU 6320 MANUFACTURERS STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,TENSION,HEX HEAD,CLOSE TOLERANCE,A286 CRES,SHORT THREAD,REDUCED MAJOR THREAD DIA.,SELF-LOCKING AND NONLOCKING,160 KSI FTU |