• What kind of situation may lead to stripped thread

    There may be several reasons to cause the stripped thread

    1. A screw is with or without a lead point.

    2. Lock attached to what thickness of board is.

    3. The pounds of electric screw driver lock attached to.

    4. Screws to do the heat treatment or not.

  • What difference is between machine screw and self-tapping screw?

    Machine Screw The mating parts must have the corresponding female thread.


    Self-tapping screw The mating parts do not need to have the corresponding internal thread, and the screw itself can be with a pre-drilling hole or rely on screws to lock into a fixed drilling.

  • What is the useful life of a screw?

    Normally, there is no deadline.

    It accords with user's using method and preservation and these will decide the period of use toward a screw.