| FASTENER LENGTH | 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| HEAD DIAMETER | 0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM |
| HEAD HEIGHT | 0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM |
| HEAD STYLE | PAN |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| LOCKING FEATURE | PATCH THREADS |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, SELF-LOCKING, PAN HEAD |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL | PLASTIC NYLON LOCKING FEATURE |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.532 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |