MASONRY/CONCRETE SCREW

Tapping Process

When tapping threads into masonry, the lead thread does all of the cutting of the masonry material and is designed to cut threads up to 1-3/4” in depth.  The abrasiveness of the masonry will determine the exact depth that any specific screw can tap. The lead thread will dull and hit a point where it will no longer be able to cut threads and will stop screw penetration.  As the threads are cutting into the masonry, dust is created.  The threads are designed to allow the dust to be removed and to prevent interference with the screw installation. Therefore, the hole drilled in the masonry must be slightly deeper than the screw will penetrate to allow space for the dust that is created during the taping process to fall into and out of the way.

MASONRY/CONCRETE SCREW :

• Concrete screws are commonly blue in color, with or without corrosion coating. They may either have a Phillips flat head or a slotted hex washer head. Typically an installer uses a hammer drill to make a pilot hole for each concrete screw.