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How to Install a Flat Head Concrete Screw

Sunday, February 13, 2011
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Flat Head Tapcon Screws

The complete name of a flat-headed tapcon is a “flat Phillips countersunk tapcon." The flat-headed tapcon has a Phillips drive so that a Phillips type screwdriver can be used. The 3/16” flat-headed tapcon utilizes a #2-bit tip and the 1/4” requires a #3-bit tip.

Diameter of Flat Head Tapcons

The two diameters that are available in the flat-headed tapcon are 3/16” diameter and 1/4” diameter.

Length of Flat Head Tapcon Concrete Screws

The flat-headed tapcon length is measured as an overall length of the screw including the head. Flat-headed tapcons are manufactured in seven lengths for the 3/16” diameter: 1-1/4”, 1-3/4”, 2-1/4”, 2-3/4”, 3-1/4”, 3-3/4” and 4”. The 1/4” diameter is available in nine lengths: 1-1/4”, 1-3/4”, 2-1/4”, 2-3/4”, 3-1/4”, 3-3/4” and 4”, 5”, 6”.

Embedment Depth

Minimum embedment depth of a flat-headed tapcon is 1." Maximum embedment depth of a flat-headed tapcon is 1-3/4”.

Hole Diameter

The hole diameter that needs to be drilled into the base material is critical because the tolerance between the flat-headed tapcon diameter and hole size is critical. The hole must be drilled with a hammer-type drill and by using a carbide-tipped drill bit that meets ANSI standards. The 3/16” diameter hex head tapcon requires a 5/32” hole and the 1/4” diameter flat-headed tapcon requires a 3/16” hole.

Hole Depth

The depth of the hole in the base material needs to be a minimum of 1/4” deeper than the flat-headed tapcon will penetrate. This will ensure space for the dust that is created during the tapping process to fall out of the way, ensuring that the flat-headed tapcon will not bottom-out in the hole.

Hold Values for Flat-Headed Tapcon Screws

DiameterMinimum Embedment2000 PSI Concrete2000 PSI Concrete
3/16” 1” 600 lbs (tension) 720 lbs (shear)
1/4” 1” 1380 lbs 1200 lbs

Flat Head Tapcon Product Information

Each flat-headed tapcon comes packaged with one correct diameter and length bit per box.

DescriptionPart NumberBit Length x DiameterQuantity Per Box
3/16” x 1-1/4 TCF316114 5/32” x 3-1/2” 100
3/16” x 1-3/4” TCF316134 5/32” x 3-1/2” 100
3/16” x 2-1/4” TCF316214 5/32” x 4-1/2” 100
3/16” x 2-3/4” TCF316234 5/32” x 4-1/2” 100
3/16” x 3-1/4” TCF316314 5/32” x 4-1/2” 100
3/16” x 3-3/4” TCF316334 5/32” x 5-1/2” 100
3/16” x 4” TCF3164 5/32” x 5-1/2” 100
1/4” x 1-1/4” TCF14114 3/16” x 3-1/2” 100
1/4” x 1-3/4” TCF14134 3/16” x 3-1/2” 100
1/4” x 2-1/4” TCF14214 3/16” x 4-1/2” 100
1/4” x 2-3/4” TCF14234 3/16” x 4-1/2” 100
1/4” x 3-1/4” TCF14314 3/16” x 4-1/2” 100
1/4” x 3-3/4” TCF14334 3/16” x 5-1/2” 100
1/4” x 4” TCF144 3/16” x 5-1/2” 100
1/4” x 5” TCF145 3/16” x 6-1/2” 100
1/4” x 6” TCF146 3/16” x 7-1/2” 100

Installing Flat Head Tapcon Screws

  • Drill a hole in the base material using a hammer drill and correct diameter bit for the flat-headed tapcon screw being installed.
  • Depth of hole should be drilled a minimum of 1/4” deeper than flat-headed tapcon would penetrate the base material.
  • Clean the hole of all dust by using a wire brush, vacuum or compressed air.
  • Insert flat-headed tapcon into the predrilled hole in the base material and turn clockwise until the head of tapcon is snug against the fixture.

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Always use personal protective equipmentAs with any anchoring project, it is important to keep safety in mind and follow instructions carefully. Always remember to wear safety goggles, handle all tools with extra care and follow all technical specifications. This article is meant to serve only as a basic explanation of concrete fasteners. Always refer to manufacturer's instructions or consult a contracting expert during any anchoring project.

Article Written By:
Mike Pistorino, Vice-President Operations

 

 

 

 


Concrete Fastening Systems, Inc. has over 40 years of experience selling concrete fasteners. We can ship out one box or a whole pallet of concrete anchors. Our products are of the highest quality... "your satisfaction is guaranteed". We ship all orders the same day the order is received.

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