What are Strike Anchors?
Strike anchors are hammer-set expansion anchors for solid concrete, brick, and filled block. Striking the built-in pin expands the anchor body in the hole, giving a quick, secure hold with a clean, low-profile head.
When should I use Strike Anchors?
- Fast installs for plates, brackets, furring, clips, and light framing
- Overhead work where a flush finish is preferred
- Solid concrete, brick, or filled block (avoid thin hollow shells)
- Applications that don’t require frequent removal or adjustment
How do Strike Anchors work?
Drill the listed hole size, insert the anchor through the fixture, and strike the pin. The pin drives a wedge that expands the body against the hole wall. The head seats flush and clamps the fixture.
Types of Strike Anchors
- Double-headed for extra stability and heavier attachments
- Mushroom-headed for a wide, smooth finished look
- Internally threaded head accepts a coupler/bolt for removable hardware
- Tie-wire head for hanging wire, lighting, and suspended systems
Sizing and fit for Strike Anchors
- Common diameters: 3/16 in, 1/4 in, 3/8 in
- Select length to cover fixture thickness and meet the minimum embedment for the diameter
- Use the specified carbide drill bit and drill slightly deeper than embedment for dust clearance
Materials and finishes
Zinc plated steel
Economical option for dry, indoor environments.
Stainless steel (18-8)
Better corrosion resistance for damp areas and outdoor exposure.
Installation tips for Strike Anchors
- Drill straight, then brush and blow out hole dust for reliable expansion
- Seat the head flat on the fixture before striking the pin fully
- Respect edge distance and spacing to avoid cracking concrete or brick
- Do not use in weak, crumbling, or thin hollow block shells
Strike Anchors vs Hammer Drive Anchors
Both are hammer-set. Strike anchors offer multiple head styles (including internally threaded) and a clean finish; hammer drive anchors are simpler for very light-duty fastening. For higher loads in solid concrete, consider wedge or sleeve anchors.
FAQs about Strike Anchors
Clear answers for selection, sizing, installation, and base materials.
- What are strike anchors used for?
Fastening brackets, plates, furring, clips, and hangers to solid concrete, brick, or filled block where a flush, finished head is preferred.
- Do strike anchors work in hollow block?
They hold best in solid concrete, brick, or fully filled block. Thin hollow shells may not provide enough material for expansion.
- What drill bit size should I use?
Use the bit size listed for the anchor diameter and drill slightly deeper than the embedment so dust has room at the tip.
- How strong are strike anchors compared to wedge anchors?
Strike anchors are for light to medium-duty loads and quick installs. Wedge anchors are usually stronger for structural attachments in solid concrete.
- Can strike anchors be removed?
They are generally permanent. You can remove the fixture and drive the pin flush or cut the head; reuse is not recommended.
- Which material should I choose for outdoor use?
Use stainless steel (18-8) for better corrosion resistance. Choose zinc plated only for dry interior spaces.
- Why is cleaning the hole important?
Dust left in the hole can prevent full expansion and reduce holding power. Brush and blow out the hole before setting the anchor.