Hub bolts A high-strength bolt that connects a vehicle to the wheels. The connection position is the hub unit bearing of the wheel! General micro car is used 10.9 level, large and medium-sized vehicles use 12.9 level! The structure of hub bolts is generally kine spline and thread! And a hat! T-head hub bolts are mostly of grade 8.8 and above, which bear the large torque connection between the hub and axle! Double-head hub bolts are mostly of class 4.8 and above, which bear the connection of light torque between automobile outer hub shell and tires
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