| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 0.719 INCHES MINIMUM AND 0.750 INCHES MAXIMUM |
| HEAD DIAMETER | 0.177 INCHES MINIMUM AND 0.225 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| LOCKING FEATURE | PATCH THREADS |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL | PLASTIC NYLON LOCKING FEATURE |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.112 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW SELF-LOCKING FLAT HEAD |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.624 INCHES MINIMUM AND 0.705 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNJC |
| THREAD QUANTITY PER INCH | 40 |