FAQ of Shell Type Lock Bolt Kit:
The shell type lock bolt is divided into a forged shell made of aluminum alloy 7075- T6 material and SCM440 high strength forging screw. When installing the shell bolt, the shell is screwed down, the bolt is installed first, and the bolt is installed with a socket of 17 mm. The torsion is as follows:
Since the BONOSS extended bolts have the same or higher level and performance than the factory bolts, which can withstand greater tightening torques. However, we recommend using the torque recommended by the original car for locking due to the different wheels and different original lug thread.
In general, the tightening torque is as follows: