| THREAD SERIES DESIGNATOR | ISO M |
| THREAD PITCH IN MILLIMETERS | 1.3 |
| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 20.0 MILLIMETERS NOMINAL |
| MATERIAL | STEEL PROPERTY CLASS 8.8 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ISO 898-1 NATIONAL STD/SPEC ALL MATERIAL RESPONSES OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MS 203 MIL STD ALL TREATMENT RESPONSES OVERALL |
| HEAD STYLE | FLAT COUNTERSUNK UNDERCUT |
| HEAD DIAMETER | 15.5 MILLIMETERS MINIMUM AND |
| 16.0 MILLIMETERS MAXIMUM |
| HEAD HEIGHT | 4.4 MILLIMETERS MAXIMUM |
| COUNTERSINK ANGLE | 90.0 DEGREES NOMINAL |
| HOLE DIAMETER | 8.8 MILLIMETERS NOMINAL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | HEXAGON SOCKET FLAT COUNTERSUNK HEAD CAP SCEW |