| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 1.250 INCHES NOMINAL |
| HEAD DIAMETER | 0.568 INCHES MINIMUM AND 0.635 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MINIMUM TENSILE STRENGTH | 60000 POUNDS PER SQUARE INCH |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,MACHINE,FLAT COUNTERSUNK HEAD,CROSS-RECESSED |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | CAGE 19207, DWG 12469117 (MAGNI COATING) MFR REF SINGLE TREATMENT RESPONSE |
| SCREW MATERIAL | STEEL |
| SCREW SURFACE TREATMENT | BLACK CHEMICAL FINISH |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.139 INCHES MINIMUM AND 1.250 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 18 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |