How to Drill Holes for Screws in Hardwood
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may be readily set into hardwood by drilling a pilot hole
having a diameter equal to that of the root of the screw and
a clearance hole equal to that of the shank or gauge of the
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holes in hardwoods are countersunk to bring screw head flush
with surface when the screw is driven. The screw head can
be covered with a wood plug, when screw is driven, if the
hole is counterbored.
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of holes for accommodating screw heads vary with the type
of screw used: Common types are shown in diagram.
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heads are either slotted or recessed.
Screw holes are drilled in hardwood so that the screws can
be readily driven at the correct angle to hold the material
with maximum strength. In addition, drilled holes reduce the
probability of damage to the screws and to the material joined.