| THREAD SERIES DESIGNATOR | M |
| THREAD LENGTH | 38.0 MILLIMETERS NOMINAL |
| FASTENER LENGTH | 40.0 MILLIMETERS NOMINAL |
| MATERIAL | STEEL PROPERTY CLASS 10.9 OVERALL |
| HEAD STYLE | HEXAGON |
| THREAD DIRECTION | RIGHT-HAND |
| NOMINAL THREAD DIAMETER | 16.0 MILLIMETERS |
| THREAD PITCH IN MILLIMETERS | 2.0 |
| EXTERNAL THREAD TOLERANCE CLASS | 6G |
| SURFACE TREATMENT | ZINC OVERALL |
| HEAD HEIGHT | 9.68 MILLIMETERS MINIMUM AND |
| 10.32 MILLIMETERS MAXIMUM |
| WIDTH BETWEEN FLATS | 23.67 MILLIMETERS MINIMUM AND |
| 24.00 MILLIMETERS MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW CAP HEX |