Concrete Screw (Tapcon)
Tapcon 1/4" Concrete Screw — 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
3/16"
Pilot Hole Depth
1-1/4" min
Embedment Depth
1-1/4" minimum
Torque Value
45-60 in-lbs
Max Load
250-500 lbs (tension), 350-600 lbs (shear)
Material
Carbon steel (blue), Stainless steel (silver)
Removable
Yes
Available Lengths
1-3/4", 2-1/4", 2-3/4", 3-1/4", 4"
Substrates: Concrete, Brick, CMU block (solid face), Stone
Best for
- Lumber to concrete
- Handrail brackets
- Shelving brackets
- Heavier fixtures
Not suitable for
- Hollow block
- High seismic zones without engineer review
- Overhead structural
Installation tips
- 1.Use a 3/16" carbide masonry bit — same as the anchor diameter
- 2.Clean the hole with compressed air before driving
- 3.Apply steady torque — stop immediately if resistance drops (stripped thread)
- 4.For exterior use, specify stainless or hot-dip galvanized
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