| 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 MINIMUM |
| FASTENER LENGTH | 1.105 INCHES MINIMUM AND |
| 1.135 INCHES MAXIMUM |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | A286 CRES PER AMS5731,5732,5737 OR AMS5853 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS2700,METHOD 1,CLASS 4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| HEAD STYLE | BEVEL-CONICAL |
| HEAD DIAMETER | 0.428 INCHES MINIMUM AND |
| 0.438 INCHES MAXIMUM |
| HEAD HEIGHT | 0.250 INCHES NOMINAL |
| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.1880 INCHES MINIMUM AND |
| 0.1900 INCHES MAXIMUM |
| SURFACE FINISH | 32.0 MICROINCHES OVERALL |
| SPECIFICATION/STANDARD DATA | 80205-NAS9921 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,SHEAR,INTERNAL WRENCHING,SHORT THREAD,SELF-LOCKING AND NON-LOCKING,6AL-4V TITANIUM AND A286 CRES,160 KSI FTU |