| THREAD SERIES DESIGNATOR | M |
| NOMINAL THREAD DIAMETER | 8.0 MILLIMETERS |
| THREAD PITCH IN MILLIMETERS | 1.25 |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 39.5 MILLIMETERS NOMINAL |
| FASTENER LENGTH | 40.0 MILLIMETERS NOMINAL |
| MATERIAL | STEEL PROPERTY CLASS 10.9 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM F568M AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM F2833 GRADE 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HEAD STYLE | BUTTON |
| HEAD DIAMETER | 13.57 MILLIMETERS MINIMUM AND |
| 14.00 MILLIMETERS MAXIMUM |
| HEAD HEIGHT | 4.1 MILLIMETERS MINIMUM AND |
| 4.4 MILLIMETERS MAXIMUM |
| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 5.02 MILLIMETERS MINIMUM AND |
| 5.08 MILLIMETERS MAXIMUM |