This is a special combination of a screw and a screw with a metric thread, which can be used for fixing in wood or using a dowel, for example, in masonry. It is fixed with a key using a hexagon in the middle or with the help of an internal hexalobular (TX) groove on the top of the screw - the dimension of the hexalobular changes with the diameter of the product, see the table.
Product documents:
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