| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| HEAD DIAMETER | 0.442 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MINIMUM TENSILE STRENGTH | 62000 POUNDS PER SQUARE INCH |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | MACHINE SCREW, FLAT COUNTERSUNK HEAD |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE |
| SCREW MATERIAL | ALUMINUM ALLOY 2024 |
| THREAD LENGTH | 0.359 INCHES MINIMUM AND 0.390 INCHES MAXIMUM |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |