| FASTENER LENGTH | 50.00 MILLIMETERS NOMINAL AND 49.50 MILLIMETERS MINIMUM AND 50.50 MILLIMETERS MAXIMUM |
| HEAD HEIGHT | 11.78 MILLIMETERS MINIMUM AND 12.22 MILLIMETERS MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | BS 6105 A4 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL |
| MINIMUM TENSILE STRENGTH | 800 NEWTONS PER SQUARE MILLIMETER |
| NOMINAL THREAD DIAMETER | 18.00 MILLIMETERS |
| WIDTH BETWEEN FLATS | 26.67 MILLIMETERS MINIMUM AND 27.00 MILLIMETERS MAXIMUM |
| STRENGTH GRADE DESIGNATION | ERR-030 |
| THREAD CLASS | 6G |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 42.00 MILLIMETERS NOMINAL AND 42.00 MILLIMETERS MINIMUM AND 47.00 MILLIMETERS MAXIMUM |
| THREAD SERIES DESIGNATOR | ISO M |
| THREAD PITCH IN MILLIMETERS | 2.50 |