| THREAD SERIES DESIGNATOR | ISO M |
| THREAD LENGTH | 21.50 MILLIMETERS MINIMUM AND |
| 22.50 MILLIMETERS MAXIMUM |
| FASTENER LENGTH | 44.65 MILLIMETERS MINIMUM AND |
| 45.95 MILLIMETERS MAXIMUM |
| MATERIAL | STEEL PROPERTY CLASS 8.8 OVERALL |
| HEAD STYLE | HEXAGON |
| THREAD DIRECTION | RIGHT-HAND |
| SURFACE TREATMENT | ZINC OVERALL |
| HEAD HEIGHT | 5.15 MILLIMETERS MINIMUM AND |
| 5.45 MILLIMETERS MAXIMUM |
| WIDTH BETWEEN FLATS | 12.73 MILLIMETERS MINIMUM AND |
| 13.00 MILLIMETERS MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | HEX CAP SCREW, M8-1.25X40MM |
| SPECIAL FEATURES | WRENCH SIZE-13MM, WEIGHT- 0.0447, PARTIAL THREAD- COARSE |