| EXTERNAL THREAD TOLERANCE CLASS | 6G |
| FASTENER LENGTH | 64.50 MILLIMETERS MINIMUM AND 65.00 MILLIMETERS MAXIMUM |
| HARDNESS RATING | 225.0 BRINELL STANDARD MINIMUM AND 300.0 BRINELL STANDARD MAXIMUM OVERALL |
| HEAD HEIGHT | 12.79 MILLIMETERS MINIMUM AND 13.22 MILLIMETERS MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 785 NEWTONS PER SQUARE MILLIMETER |
| NOMINAL THREAD DIAMETER | 20.00 MILLIMETERS |
| WIDTH BETWEEN FLATS | 29.67 MILLIMETERS MINIMUM AND 30.00 MILLIMETERS MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | BS 1706 ZN3 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC AND CHROMATE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 64.50 MILLIMETERS MINIMUM AND 65.50 MILLIMETERS MAXIMUM |
| THREAD SERIES DESIGNATOR | ISO M |
| THREAD PITCH IN MILLIMETERS | 2.50 |