Ultracon is the brand name for a concrete screw manufactured by Elco. Ultracon concrete screws mechanically link to masonry base material and are available in three diameters of 3/16”, 1/4”, and 5/16” and in lengths ranging from 1” to 6”. The Ultracon concrete screws mechanically link to the masonry base material and are available in 3 diameters of 3/16”, 1/4” and 5/16 and in lengths ranging from 1” to 6”. Ultracon concrete screws can be installed at a rate of 2 to 3 per minute when the installation tool is used. Using the installation tool, precision-cut carbide drill bit, and the Ultracon concrete screw can assure maximum pullout strengths and consistent holding values. The Ultracon concrete screw is used to fasten items such as electrical boxes, wood headers, and plywood, furring strips or wood windows to concrete, brick or block. The Ultracon is equivalent to the tapcon.
The length of Ultracon concrete screw to use in any particular applications is determined by combining the thickness of the material to be fastened with the embedment depth of the Ultracon screw in the base material. The minimum recommended embedment for the Ultracon is 1” and the maximum embedment is 1-3/4”.
For example, a 2x4 being fastened to concrete with a minimum embedment of 1” would require a minimum Ultracon length of 1-1/2”(thickness of 2x4) + 1” (minimum embedment) = 1-1/2”. The Ultracon screw chosen would be the 2-3/4” because it is the closest length Ultracon that would meet the requirements. The longest Ultracon screw to use for fastening a 2x4 to concrete would be 1-1/2” (thickness of 2x4) + 1-3/4” (maximum embedment) = 3-1/4”. The 3-1/4” Ultracon concrete screw would be the best choice for such an application.
The diameter of Ultracon concrete screw is chosen based on the holding values required for any particular application and the hole size in the material being fastened. The Ultracon comes in three diameters of 3/16”, 1/4” and 5/16” and each diameter’s holding values is based on the type of base material and the depth of embedment into the base material.
Depth of Hole
The depth of the hole in the base material should be a minimum of 1/4” deeper that the Ultracon screw will penetrate. The hole needs to be drilled deeper to allow space for the dust to fall into that is created during the tapping of the threads into the base material. It is important that normal safety precautions be observed when drilling holes to avoid electrical wires and rebar.
The Ultracon concrete screws require a hole to be drilled into the base material before the screw is inserted. The hole size is critical and must match the tolerances required for the Ultracon screw to obtain its proper holding values. The 3/16” Ultracon requires a 5/32” bit and the 1/4” Ultracon requires a 3/16” bit. The bit must meet ANSI standards and have a carbide tip. The hole that is drilled for an Ultracon concrete screw must be drilled using a hammer drill set in the hammer and rotation mode.
Ultracon Head Styles
The Ultracon concrete screws come in six different head styles to meet most applications requirements:
The Ultracon concrete screw has markings on the head of each screw that identify it as an Ultracon brand concrete screw. Both the flat and hex head have the Elco logo stamped onto the surface of the head of the screw. The TrimFit® Ultracon screws have a dot stamped onto the head opposite the logo. One dot means that it is a 1/4” flat head TrimFit® and two dots show that it is a 5/16” TrimFit®.
As with any anchoring project, it is important to keep safety in mind and follow instructions carefully. Always remember to wear safety goggles, handle all tools with extra care and follow all technical specifications. This article is meant to serve only as a basic explanation of concrete fasteners. Always refer to manufacturer's instructions or consult a contracting expert during any anchoring project.