Fastener Length
The length of the Kwik-Con II+ fastener to be used is determined by combining the thickness of the fixture being attached (A) with the desired depth of embedment in the masonry material (B). It is recommended that a minimum of 1" and a maximum of 1 ³/4" embedment be used in determining fastener length.

Kwik-Con II+ fasteners come in two diameters--1/4" and 3/16". The diameter of the fastener and the depth of embedment affect pullout strengths. Application strength requirements and safety factors should be considered when determining the depth of embedment and fastener diameter. For assistance, contact your local Hilti Sales Representative.

Hole Depth
A TKC matched tolerance carbide tipped drill bit is supplied with each box of Kwik-Con II+ fasteners. The correct hole depth (B+C) can normally be obtained by drilling the full length of this bit. In all cases, the hole must be at least 1/2" deeper than the depth of the fastener embedment. Normal safety precautions should be observed when drilling the holes to avoid electrical installations, other utilities and reinforcement bars.

Hole Diameter
The diameter of the drilled hole is also important to the performance of the Kwik-Con II+ masonry fastening system. Using Hilti TKC (concrete) or TKB (block) matched tolerance carbide-tipped bits will assure consistent fastener performance and maximum pullout strength.

B = Kwik-Con II+ embedment
minimum of 1', maximum of 1³/4" is recommended

A + B = Length Kwik-Con II+ to be used

B + C = Depth of hole drilled
must be at least 1/2" deeper than Kwik-Con II+ embedment

TORX and Phillips Flat Head
Used primarily in wood applications to countersink head for finished appearance