The wedge anchor (Thunderstud^®) is used for heavy duty fastening applications, where high pullout values are required. Wedge anchors are designed to anchor into solid concrete or grout-filled masonry. Described as wedge anchors because, once inserted, they expand to anchor themselves into the surface, these products come in a variety of diameters, lengths and materials specific to project application.

Commonly Called

Wedge anchors, stud anchor, kwik-bolt, thunderstud, thunderstuds, wedge anchors, DFS wedge anchor, sup-r-stud, kwik bolt 2 anchor, Hilti kwik bolt, kwik bolt, concrete stud anchor, stud wedge anchor, stud anchor system, power bolt, power stud, trubolt, redi bolt, wedge all and kingpin.

Reasons to use Concrete Wedge Anchors

• Ready to use
• Easy to install
• Anchor diameter equals hole diameter
• Comes complete with the correct number of nuts and washers
• Collar expands a full 360 degrees against base material
• Cost effective, great load value

Special Features of Concrete Wedge Anchors

• Length identification code stamped on the head to facilitate quality control and inspection after installation
• Mechanical expansion allows for immediate load application
• Product testing demonstrates consistent performance in concrete, light-weight concrete and grout-filled block base material
• Collar design reduces chance of spinning during installation

Installation Applications of Wedge Anchors

• Machinery
• Handrails
• Storage racks
• Piping
• Junction boxes

There are nine available Thunderstud^® wedge anchor diameters*, each that comes in a variety of different lengths, plating and steel types.

Available Wedge Anchor Diameters

• 1/4”
• 5/16”
• 3/8”
• 1/2”
• 5/8”
• 3/4”
• 7/8”
• 1”
• 1¼”

*Each wedge anchor diameter requires a minimum embedment in the base material, comes in a variety of standard lengths and can also be specially made to meet the needs of individual projects.

Plating and Steel Type Options

• Zinc plated
• Hot-Dipped Galvanized
• 303 stainless steel
• 304 stainless steel
• 316 stainless steel

Instructions for Using Wedge Anchors

Determine the appropriate wedge anchor length for your project.

1. Add:
   The thickness of material to be fastened
   -to-
   The minimum embedment required
   -to-
   The thickness of the nut and washer (about one anchor diameter).
2. Once you have determined the appropriate wedge-type-anchor length, drill your hole using a bit with the same diameter, ½” deeper than the anticipated anchor embedment.
3. Clean the drilled hole of any debris.
4. Thread the nut and washer until the nut is flush with the top of the anchor.
5. Hammer it into position (nut and washer flush with the surface of the material).
6. Tighten finger completely and then take an additional 3-5 turns with the wrench.
7. If the anchor spins in the hole, force it up using a screwdriver until the clip binds into the concrete.

---

Back to top | Purchase Wedge Anchors | Other Concrete Fasteners and Anchors