New CONFAST Double Expansion Anchor is Made from Zamac Alloy

Press Release Summary:

CONFAST Double Expansion Anchor features two cones, one with threading and other without threading. Unit is used for anchoring into concrete, brick or block base material. The anchor comes with two spring steel bands that allow expansion of the anchor against concrete at two points. Anchor is resistant to rust and is offered in diameter of ¼, 5/16, 3/8, ½, 5/8, and ¾ in. and hole diameters of ½, 5/8, 5/8, 7/8, 1 and 1-1/4 in. respectively.

Original Press Release:

CONFAST Double Expansion Anchor Now Available

The CONFAST double expansion anchors are designed for anchoring into concrete, brick or block base material. The double expansion anchor is great for projects where the base material is soft or has strength that is suspect.

Double expansion anchors are designed for anchoring into concrete, brick or block base material. The anchor body is made from a die cast alloy called Zamac, which is rust resistant and extremely durable. It has two expansion cones: one cone is threaded and the other is not. Two spring steel bands wrap the two halves together and allow the anchor to expand against the concrete at two points to allow for better holding values once installed.

Tips for Using the Double Expansion Anchor

Designated Diameter / Hole Diameter

1/4”                                 ½”

5/16”                               5/8”

3/8”                                 5/8”

1/2”                                 7/8”

5/8”                                 1”

3/4”                                 1-1/4”   

  • The length of the bolt that should be used for all installations of the anchor is equal to the thickness of the material being fastened plus the depth the anchor will be embedded.
  • It is important to note that one end of the double expansion anchor has a nut that is threaded. When installing it, hold the opposite end or the end with the nut that is not threaded and insert the threaded nut end into the hole first. Tap lightly with a hammer if needed until the anchor is flush with the surface of the base material.
  • Take the fixture being fastened and align the holes in the fixture with the double in the base material.
  • Insert the national threaded bolt through the fixture and into the anchor. Turn the bolt clockwise until the anchor is fully set. Do not over torque the bolt since this may cause the double expansion anchor to spin in the hole and lose its holding strength.

Those searching for an anchor to be used in base material of questionable strength, requiring easy removability and a corrosion resistant body, can now purchase the double expansion anchor direct from the manufacturer at


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