Purchase Tapcon® Concrete Screws
Technical Information:
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 Climaseal® coating which provides extended
life and additional lubricity for ease of installation. Tapcon®
screws are also available in 410 stainless steel finished
with Climashield. The stainless steel screws have shown
no red rust in salt spray test performed at a certified A2LA
laboratory per ASTM B117 specifications.
Tapcon® Concrete Screw -
Applications:
Light to medium duty in concrete, brick and block.
Tapcon® Concrete Screw -
Installation:
(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.
Tapcon® Concrete Screw -
Screw Length:
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.
Tapcon® Concrete Screw - Technical Data:
Pull-Out Values
| Size |
Embedment |
Concrete 3725 psi |
Hollow Block |
| 3/16" |
1" |
380 lb. |
229 lb. |
| 3/16" |
1-3/4" |
1090 lb. |
521 lb. |
| 1/4" |
1" |
800 lb. |
490 lb. |
| 1/4" |
1-3/4" |
2100 lb. |
801 lb. |
Shear Values
| Size |
Embedment |
Concrete 3725 psi |
Hollow Block |
| 3/16" |
1-3/8" |
875 lb. |
690 lb. |
| 1/4" |
1-3/4" |
1924 lb. |
1059 lb. |
All pullout values are based on close-tolerance holes drilled
with 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 Concrete Fastening Systems. 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 ratio.