What is the Difference Between Fully and Partially Threaded Socket Head Screws?

fully threaded socket head screw partially socket head screw

  • Fully threaded screws engage with a tapped, threaded hole all the way to the head. Choose these when sideways force is not a concern.

  • Partially threaded screws have an unthreaded portion under the head for more holding power when force is applied from the side. The unthreaded portion is stronger than the threaded portion of a screw. Thread length may vary from the minimum thread length published to fully threaded.








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