Zinc alloy double expansion anchor is a kind of anchorage,used in masonry, concrete or lightweight solid wall base structure for anchoring and fixing the objects. It is made of zamac material by die casting machine. The design has two heavy shields and two conical expansion nuts pre-assembled by a spring ring.One nut is tapped by inch internal thread, and another nut has no thread.When installing, it is necessary to pre-drill an installing hole and fasten machine bolt to expand for fixing.
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