Concrete Screw (Tapcon)
Tapcon 3/8" 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
3/8"
Pilot Hole Size
5/16"
Pilot Hole Depth
1-3/4" min
Embedment Depth
1-3/4" minimum
Torque Value
60-85 in-lbs
Max Load
600-900 lbs (tension), 800-1,200 lbs (shear)
Material
Carbon steel (blue), Stainless steel (silver)
Removable
Yes
Available Lengths
2-1/4", 3", 3-3/4", 4-1/2"
Substrates: Concrete, Brick, CMU block (solid face), Stone
Best for
- Heavy door frames
- Ledger boards
- Structural brackets
- Machinery mounts (light)
Not suitable for
- Hollow block
- Cracked concrete
- High seismic zones without review
Installation tips
- 1.Use a 5/16" carbide masonry bit — the largest common Tapcon size
- 2.3/8" Tapcons require more torque — use an impact driver or torque wrench
- 3.Pre-drill with a rotary hammer for cleaner holes and better thread engagement
- 4.Space anchors minimum 10× diameter (3-3/4") apart for full rated load
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