Drop-In Anchor
1/4" Drop-In Anchor — Complete Specifications
Pilot hole size, embedment depth, torque values, load ratings, and installation guide per ACI 318-19.
Fastener Specification — ACI 318-19
Diameter
1/4"
Pilot Hole Size
3/8"
Pilot Hole Depth
1" minimum
Embedment Depth
5/8" (flush with surface)
Torque Value
Set with setting tool — no torque spec
Max Load
500 lbs (tension), 700 lbs (shear)
Material
Zinc-plated steel, Stainless steel
Removable
No (permanent)
Available Lengths
5/8" shell
Substrates: Solid concrete only
Best for
- Lightweight suspended ceilings
- Pre-set anchoring positions
- All-thread rod (1/4-20)
- Electrical conduit hangers
Not suitable for
- Hollow block
- Brick
- Overhead structural without engineer review
Installation tips
- 1.Drill a 3/8" hole for a 1/4" drop-in anchor — the oversized hole is intentional
- 2.Setting tool is mandatory — do not attempt to set by driving the bolt directly
- 3.Set flush with or slightly below the concrete surface
- 4.Used with 1/4-20 threaded rod or machine bolt
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