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TapCon®
Concrete Screw |
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Technical
Information: |
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The
TapCon® brand concrete screw cuts threads in a predrilled hole in concrete,
brick or block. The screw has alternating raised and lowered threads with
diamond cut notches which provide exceptional holding power and stability.
The TapCon® brand concrete screw is available in both 3/16" or
1/4" diameters with either a flat phillips #3 countersunk or a 5/16"
hex washer head. All screws are plated using the Stalgard coating which
provides extended life and additional lubricity for ease of installation.
TapCon® screws are also available in 410 stainless steel finished with
a silver Stalgard. The stainless steel screws have shown no red rust in
salt spray test performed at a certified A2LA laboratory per ASTM B117 specifications. |
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Applications:
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Light
to medium duty in concrete, brick and block.
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Installation:
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(1)
Drill hole into base material using the drill bit provided with the screws.
The depth of the hole must be at least 1/4" deeper than the TapCon
embedment. (2) Place object to be fastened over hole. (3) Insert point of
Tapcon into hole and drive screw in using a nut drive or #3 bit tip. Do
not over torque the screw.
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Screw
Length: |
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The
length of the TapCon® fastener to be used is determined by combining
the thickness of the material to be attached with the desired depth of embedment
in the base material. It is recommended that a minimum of 1" and a
maximum of 1-3/4" embedment be used in determining fastener length.
The diameter of the fastener and the depth of embedment affect pullout strengths.
A carbide-tipped drill bit is supplied with each box of TapCon® fasteners.
The correct hole must be drilled for the screw to obtain holding values.
In all cases the hole must be at least 1/4" deeper than the depth of
the fastener embedment.
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Pull-Out
Values
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| Size |
Embedment
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Concrete
3725 psi |
Hollow
Block |
| 3/16" |
1" |
380 lbs |
229 lbs. |
| 3/16" |
1-3/4" |
1090 lbs. |
521 lbs. |
| 1/4" |
1" |
800 lbs. |
490 lbs. |
| 1/4" |
1-3/4" |
2100 lbs |
801.lbs |
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Shear
Values
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| Size |
Embedment
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Concrete
3725 psi |
Hollow
Block |
| 3/16" |
1-3/8" |
875 lbs. |
690 lbs. |
| 1/4" |
1-3/4" |
1924 lbs. |
1059 lbs. |
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All
pullout values are based on close-tolerance holes drilled with Elco carbide
tipped drill bits. Designated holding power depends on the quality of the
masonry material, depth of embedment, and proper hole size. These figures
are offered only as a guide and are not guaranteed by Elco Textron. The
figures indicate average pullout and shear failure values. A. safety factor
of 4:1. or 25% of ultimate pullout value, is generally accepted as a safe
working load, however, reference should always be made to applicable codes
for the specific safe working ration. |
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