A threaded-sleeve anchor used in drilled holes is typically installed by what means?

• A. Hammering a bolt into a pre-tapped hole
• B. Screwing into a nut
• C. Welding to a surface
• D. Driving into a drilled hole with a setting tool

Answer: (D)

Threaded-sleeve anchors in drilled holes rely on expanding the sleeve inside the hole to grip the wall. After drilling and cleaning the hole, you insert the anchor and use a setting tool to drive the inner member, which expands the sleeve outward. This expansion creates a secure hold through friction and mechanical interference with the hole walls. Other methods aren’t suited for this type of anchor: hammering into a pre-tapped hole, screwing into a nut, or welding to a surface don’t produce the necessary sleeve expansion in a drilled hole.