Selecting The Correct Pocket Hole Screw - Kreg Mini MKJ Instruction Manual

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Selecting the Correct Screw
KREG self-tapping screws are specially designed for pocket hole joinery. They
feature a self-tapping auger point that eliminates pre-drilling and a flat head
that seats flushly in the bottom of the pocket hole. All of our screws utilize a
#2 square drive recess. The deep recess of the square drive provides positive
driver engagement to reduce cam-out. Like every KREG product, our screws
are manufactured from the highest quality materials. To manufacture a
virtually unbreakable screw, industrial quality steel is first case-hardened and
then coated with a dri-lube finish which reduces driving torque and gives them
their bronze appearance. Many of our screw types are available in a weather
resistant coating that is approximately 10 times more corrosion resistant than a
standard zinc plated screw.
Choosing the right screw...
We offer three thread types, two head styles and four different lengths to
handle nearly all pocket hole applications. The characteristics for choosing
the screw for your project are detailed below.
Thread Types
A fine-thread screw is used any time you're
driving the screw into a hardwood (i.e., oak,
maple, walnut, cherry, hickory, etc.) The
coarse-thread screw has a larger thread
diameter and provides greater holding
power when driving a screw into soft
material such as plywood, particle board,
MDF, melamine, and pine. We also offer a
Hi-Lo thread type which consists of two
separate threads, one higher than the other
that serves as a general purpose screw in
medium hardwoods like poplar. The Hi-Lo
screw is only offered in the 1-1/4" length.
Figure
(22)