| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.2500 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.316 INCHES NOMINAL |
| FASTENER LENGTH | 1.676 INCHES MINIMUM AND |
| 1.706 INCHES MAXIMUM |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | A286 IAW AMS5731,5732,5737 OR 5853 NATIONAL STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS2700,METHOD 1,CLASS 4 NATIONAL STD SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 5820 POUNDS PER SQUARE INCH |
| HEAD STYLE | PAN |
| HEAD DIAMETER | 0.473 INCHES MINIMUM AND |
| 0.492 INCHES MAXIMUM |
| HEAD HEIGHT | 0.162 INCHES MINIMUM AND |
| 0.175 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) |
| GRIP LENGTH | 1.375 INCHES NOMINAL |
| GRIP DIAMETER | 0.2485 INCHES MINIMUM AND |
| 0.2495 INCHES MAXIMUM |
| SURFACE FINISH | 125.0 MICROINCHES HEAD |
| 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| 125.0 MICROINCHES GRIP |
| 32.0 MICROINCHES THREADS |
| SPECIAL FEATURES | OFFSET CRUCIFORM RECESS IAW NASM33781 OR NASM14191;HEAD MARKED WITH BASIC PART NUMBER,APPLICABLE DASH NUMBER,MFG TRADE MARK AND MATL CODE WHERE APPLICABLE;HEAT TREAT 160-190 KSI FTU |
| SPECIFICATION/STANDARD DATA | 80205-NAS1131 THRU NAS1138 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,MACHINE,PAN HEAD,CLOSE TOLERANCE,SHORT THREAD,OFFSET CRUCIFORM |