| FASTENER LENGTH | 99.30 MILLIMETERS MINIMUM AND 100.70 MILLIMETERS MAXIMUM |
| HARDNESS RATING | 225.0 BRINELL STANDARD MINIMUM AND 300.0 BRINELL STANDARD MAXIMUM |
| HEAD HEIGHT | 7.82 MILLIMETERS MINIMUM AND 8.18 MILLIMETERS MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 785 NEWTONS PER SQUARE MILLIMETER |
| NOMINAL THREAD DIAMETER | 12.00 MILLIMETERS |
| SPECIAL FEATURES | STRENGTH GRADE 8.8 |
| WIDTH BETWEEN FLATS | 18.67 MILLIMETERS MINIMUM AND 19.00 MILLIMETERS MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | BS 3382 PART 2 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC AND CHROMATE OVERALL |
| THREAD CLASS | 6G |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 30.00 MILLIMETERS MINIMUM AND 33.50 MILLIMETERS MAXIMUM |
| THREAD SERIES DESIGNATOR | ISO M |
| THREAD PITCH IN MILLIMETERS | 1.75 |