| 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 | 0.9175 INCHES MINIMUM AND |
| 0.9475 INCHES MAXIMUM |
| MATERIAL | STEEL OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | HI ALLOY STEEL PER AMS6487 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | ALUMINUM AND |
| LUBRICANT OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-S-83488 TY II,CL 3 MIL SPEC 1ST TREATMENT RESPONSE AND |
| MIL-L-46010 TY I MIL SPEC 2ND TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 46.0 ROCKWELL C MINIMUM AND |
| 50.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 220000 POUNDS PER SQUARE INCH |
| SINGLE SHEAR STRENGTH | 132000 POUNDS PER SQUARE INCH |
| HEAD STYLE | FLAT COUNTERSUNK |
| HEAD DIAMETER | 0.447 INCHES MINIMUM AND |
| 0.507 INCHES MAXIMUM |
| HEAD HEIGHT | 0.108 INCHES NOMINAL |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND |
| 101.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) |
| GRIP LENGTH | 0.5625 INCHES NOMINAL |
| GRIP DIAMETER | 0.2485 INCHES MINIMUM AND |
| 0.2495 INCHES MAXIMUM |
| SURFACE FINISH | 32.0 MICROINCHES OVERALL |
| FEATURES PROVIDED | DRY FILM LUBRICANT |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,100 DEG FLUSH HEAD,TORQ-SET RECESS,132 KSI SHEAR |