| COUNTERSINK ANGLE | 90.0 DEGREES NOMINAL |
| FASTENER LENGTH | 89.30 MILLIMETERS MINIMUM AND 90.70 MILLIMETERS MAXIMUM |
| HEAD HEIGHT | 10.16 MILLIMETERS MAXIMUM |
| HEAD DIAMETER | 35.38 MILLIMETERS MINIMUM AND 36.00 MILLIMETERS MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM F568M INTERNATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD DIAMETER | 20.0 MILLIMETERS |
| SPECIAL FEATURES | FINISH:D60, TYPE I PER FM100 |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD PITCH IN MILLIMETERS | 2.5 |
| THREAD LENGTH | 46.00 MILLIMETERS NOMINAL |
| THREAD SERIES DESIGNATOR | M |
| WIDTH ACROSS FLATS | 12.03 MILLIMETERS MINIMUM AND 12.21 MILLIMETERS MAXIMUM |