1, do not expand the scope of the slippery wire, the first screw on some gasoline or D40, lubrication, such as is a disc, then use caution.

2, with a hammer, the slippery thread of the nut with a punch or screwdriver to punch out a deeper groove, and then screw.

3. Use one end of the screwdriver to align with the nut groove, and use the hammer head to knock the end of the screwdriver.