| HEAD HEIGHT | 0.080 INCHES NOMINAL |
| HEAD DIAMETER | 0.221 INCHES MINIMUM AND 0.226 INCHES MAXIMUM |
| HEAD STYLE | FILLISTER |
| INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW-MACHINE,.250-28X.625,CSK |
| SCREW MATERIAL | STEEL |
| SPECIAL FEATURES | DRILLED HEAD, NASM14191 RECESS |
| SPECIFICATION/STANDARD DATA | 80205-NAS1101 NATIONAL STD/SPEC |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |