Machine screw anchors are setting tools used to expand the anchor in the base of the material. Once the anchor is installed, a bolt can be threaded and unthreaded as needed.
These anchors work for light to medium duty fastening and can be installed in concrete, brick, block, and mortar joints.
It has two parts: the sleeve and the internally threaded cone. Both parts of the completed unit are made from a rust-proof material called Zamac.
No, they are only available in a Zamac, which is a rust resistant material.
These anchors are available in six sizes: 1/4”, 5/16”, 3/8”, 1/2”, 5/8”, and 3/4”.
Yes, they are the same type of anchor. Caulk-in Anchor is a brand name and machine screw anchor is the generic term that describes the anchor.
There are a number of differences between the two. The main difference is that the drop-in anchor can only be used in solid concrete while the machine screw anchor can be used in a variety of base materials.
They do not come with bolts because every application needs a specific length, type, and head style of bolt.
The designated diameter of the anchor is equal to the diameter of the bolt that it can be threaded into. For example, a 1/2” anchor requires a 1/2” bolt.
The anchor can be used in a variety of masonry base materials including concrete, brick, block, and mortar joints.
Installation is easy. Drill the hole, clean the hole, install the anchor, and finish it with a setting tool. For more detailed instructions, please visit our Tips & Tricks page.
Installing the anchors too close together can cause an interaction of the expansion forces, thus reducing the holding power of the anchor. As a rule of thumb, the expansion industry has established a minimum standard of ten anchor diameters for spacing between anchors .
Yes, a setting tool is required. It must be the correct size setting tool for the anchor being installed to ensure that the anchor is set properly.
Yes, these anchors can be set below the surface of base materials as long as the setting tool can still reach the anchor to set it properly.
No. Once set into the base material, the anchor cannot be removed without damaging the base material.
Yes. Once the anchor is set in the base material it stays set. The bolt can be removed and reinserted without affecting the holding values of the anchor.