| NOMINAL THREAD DIAMETER | 20.0 MILLIMETERS |
| WIDTH BETWEEN FLATS | 50.0 MILLIMETERS MINIMUM AND 50.8 MILLIMETERS MAXIMUM |
| SURFACE TREATMENT | ZINC ALLOY OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 43.0 MILLIMETERS MINIMUM AND 47.0 MILLIMETERS MAXIMUM |
| THREAD SERIES DESIGNATOR | ISO M |
| THREAD PITCH IN MILLIMETERS | 2.5 |
| EXTERNAL THREAD TOLERANCE CLASS | 6G |
| FASTENER LENGTH | 69.75 MILLIMETERS MINIMUM AND 70.25 MILLIMETERS MAXIMUM |
| FSC APPLICATION DATA | GUNS, OVER 150MM THROUGH 200MM |
| HEAD HEIGHT | 17.75 MILLIMETERS MINIMUM AND 18.25 MILLIMETERS MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | BS NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OR ASTM A322:4340 UNS G43400 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 1050 MEGAPASCALS |
| MINIMUM YIELD STRENGTH | 945 MEGAPASCALS |