What is a hammer head screw? Shi Shi Tong

The hammer head screw is named for its typical head shape. The head is a square head. Because it is shaped like a hammer, it is called a hammer head screw. hammer head screws are often used to secure anchor rails. The 90° rotation of the spiral anchor rail on the finger rail, for example because of the contour of the head or in the case of a hook bolt, passes through the interior of the anchor rail and is fixed with a hammer head screw.

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