Confast Spike – Pre-Expanded Anchor Now Available Online

Confast SpikeThe Confast Spike can be used in concrete, brick, block or stone base material and it is designed as a one-piece tamper and vibration resistant anchor. The Spike is called pre-expanded because no secondary tightening is required after the Spike anchor is set into the base material. The Spike® has a unique shape.

At the working end, the shank bends outwards as in an “S” and appears to be a nail that is pregnant. The Spike® is commonly referred to as the Rawl Spike and can be purchased in either a zinc plated carbon steel or a stainless steel. Spike comes in different configurations for specific applications. These are mushroom headed carbon steel Spike, flat head Spike, mushroom head stainless steel Spike, pipe Spike, tie-wire Spike and also the forming Spike.

  • Pre-expanded anchor design allows for easy installation
  • Mushroom and flat head Spike anchors are tamper-proof
  • Forming Spike, which is removable, can be used for temporary installations
  • Pipe and tie-wire Spike is a simple to install alternative to direct fastening (e.g. powder actuated)
  • Tested in accordance with both ASTM E488 and AC01 criteria
Applications for the Confast Spike

The anchor is made from Carbon Steel, and is zinc plate. This anchor is designed for use in concrete only, and should also never be used in either block or brick base material.


The anchor is designed for use in a dry environment.

Head Style

The anchor is a Double Head head and is designed to allow the head to sit on top of the surface of the item being attached.

Hole Diameter/Bit Diameter

The anchor requires a 1/4″ hole to be drilled in the base material (Concrete only). The hole should be drilled with carbide tipped bit that meets ANSI standards and also used in a hammer drill.

Diameter of Anchor

The diameter of the anchor is 1/4″.

Length Anchor

The length of the anchor is 2-3/4″

Minimum Embedment

The minimum anchor embedment into the concrete is 1-1/4″. Therefore, the anchor must be installed so that a minimum of 1-1/4″ of the anchor is embedded into the concrete.

Depth of Hole

The depth of the hole that is required for the anchor should be a minimum of 1/2″ deeper than the anchor will penetrate the concrete. This will allow space for dust created during the installation process to fall. This prevents the anchor from bottoming out in the hole before full penetration into the concrete.

Fixture Hole Diameter

The hole in the fixture or material being fastened must be larger than the designated diameter of the anchor. The 1/4″ diameter anchor requires the hole in the fixture to be 5/16″.

About Concrete Fastening Systems Inc.

Concrete Fastening Systems Inc. has been selling concrete fasteners for over 30 years from a fully stocked warehouse in Cleveland, Ohio. Free, same-day shipping in every length and diameter is available by ordering at The product delivery will happen in 1-3 days.

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