This hinge bolt is not compatible with v1.2 scooters. v1.2 scooters already have upgraded hinge bolt. If your lock pulls magnet it’s v1.2 model.
This bolt is made from 45# Steel
45# is high quality carbon structural steel, carbon content is 0.42-0.50%, with 610 Mpa tensile strength , and yield point is 360 Mpa;
45# steel is widely used in machinery manufacturing, mechanical properties of this steel is very good, so it’s generally used as axial parts.
After production, bolt is hardened, to make it even stronger, but due to M365 construction there is no guarantee it will hold forever. Better construction is on hinge bolt kit.