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The screw illustrated is a hardened self tapping type that
has a thread length of 6 mm.
As far as beekeeping goes this type of screw has been used
by me for the fitting of
8 way bee escapes
to 6 mm thick plywood. They are very easy to use as they fit the
special driving bits very well.
The incorporated flange spreads the load when used to attach
plastic components.
I use an electric screwdriver to insert these, the driving
bit holds them perpendicular to the work which makes the process
speedy and accurate.
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