Concrete and  Masonry Screws

There are numerous technical specifications that must be considered when using Concrete screws. Determinations must be made on the diameter of the screw - standard or large diameter, length of the screw - ranging from 1-1/4" to 6", head style - hex slotted or flat Phillips, material or coating - Blue RUSPERT Coating  concrete, brick or block. Once all of these factors have been determined, you can find the expected holding values in the technical information below.

There are three different types of point -- Diamond Nail Point, Sharp point and Self-Drilling Points,  feature alternating high and low threads or driving into hard materials 

To fasten to concrete, you must:

1. Drill a pilot hole, unless the screw can go in without one. The hole should be at least 1/4-in. deeper than the screw length.
2. Drive the fastener into the hole with a drill or other driving tool.
3. Be sure the fastener is snug against the concrete and doesn’t wiggle.

It’s crucial the pilot hole not be too large, or the fastener will be too loose and won’t sink properly. Also, an inexpensive or older drill might not be powerful enough to drill into concrete.

Most concrete screws are 3/16 in. or 1/4 in. in diameter. The 3/16-in. screws are plenty strong for most home tasks like installing furring strips, fastening walls to concrete floors, and attaching hardware to block or brick. The 3/16-in. size is usually the better choice since they’re a little cheaper and easier to drill.

If the 3/16-in. screws are snapping off because the concrete is too hard, switch to stronger 1/4-in. screws. You could also keep some 1/4-in. screws handy in case you strip out the hole for a 3/16-in. screw. Switch to 1/4-in. screws for heavy-duty work like securing a wall cabinet to a concrete or block wall, or supporting shelving that will hold a lot of weight.