| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.2500 INCHES |
| SHANK UNTHREADED HOLE DIAMETER | 0.76 INCHES NOMINAL FIRST HOLE |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.403 INCHES NOMINAL |
| FASTENER LENGTH | 1.576 INCHES MINIMUM AND |
| 1.606 INCHES MAXIMUM |
| SCREW MATERIAL | STEEL |
| SCREW SURFACE TREATMENT | PASSIVATE AND |
| CADMIUM |
| MINIMUM TENSILE STRENGTH | 95000 POUNDS PER SQUARE INCH |
| HEAD STYLE | FLAT COUNTERSUNK UNDERCUT |
| HEAD DIAMETER | 0.5066 INCHES NOMINAL |
| HEAD HEIGHT | 0.111 INCHES NOMINAL |
| COUNTERSINK ANGLE | 99.00 DEGREES MINIMUM AND |
| 101.00 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | TORX |
| SPLINE MAJOR DIAMETER | 0.221 INCHES NOMINAL |
| SPECIFICATION/STANDARD DATA | 80205-NAS5319 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, SHEAR, 100 DEG FLUSH HEAD, CLOSE TOLLERANCE, 95KSI |