Deck screws have coarse threads corrosion resistant coatings and sharp points and they hold up well to outdoor use.
Wood vs metal screws.
As per the name deck screws secure pressure treated lumber used in decks fences and other outdoor structures.
Some wood screws longer ones often have a threadless shank at the top of them.
Furthermore metal screws have more pitches number of threads per inch than their wood screw counterparts.
The metal rivets feature number of pitches than the wooden ones which indicates that they feature a coarser pitch.
Pitch refers to the number of threads per inch.
The oval head is wider than it is tall.
Wood and sheet metal screws come with flat heads oval heads or round heads.
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The visible difference is in the thread.
Sheet metal screws on the other hand always have a tighter sharper thread that cover their entire length.
Metal to wood screws.
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The flat head pushes an indentation into the material when the screw is tightened so that it ends up flush with the surface.
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Metal screws are threaded through the entire body while wood screws are not.
The pattern of this threading is also different.
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These screws are not really interchangeable.
Distinctive bugle heads allow deck screws to embed into wood without damaging the grain.
In wood the flat head can be driven below the surface and concealed with a wood or putty plug.
In comparison metal screws offer longer threading at two or more inches.