While all Kreg Screw heads have a flat bottom (designed to mate with the flat pocket in a Kreg pocket hole), you do have a choice in the style of head: pan-head or Maxi-Loc. They both work fine in most applications, but the pan-head is ideal for thin stock where the screw head might protrude from the pocket hole. For example, building a drawer box from 1/2′-thick stock would be an ideal application for pan-head screws.
Hardwoods like oak, maple, and cherry, on the other hand, are too hard and dense for coarse-thread screws. The aggressive threads tend to tear the wood fibers, which can result in splits in your wood. For these hardwoods, choose Fine Kreg Screws. The threads are less aggressive, but there are more of them to ensure great holding power without splitting
Woods like pine and spruce as known as softwoods. They are not very dense, so they need a screw with deep, aggressive threads that will bite into soft fibers. Coarse Kreg Screws work great for these woods, and are also the preferred choice for sheet goods like plywood and MDF.
For projects that will stay indoors, go with standard pocket screws. Kreg Zinc Screws provide rust protection, and are well-suited for indoor projects of all types that won’t be exposed to excessive moisture.
For outdoor projects, you’ll need a screw with an anti-corrosion coating. Kreg Blue-Kote™ Screws provide three anti-corrosion layers, amazing rust resistance, and they work with pressure-treated material.
If you want maximum durability, choose stainless steel screws. These are great for use in pressure-treated lumber, or if your project will be exposed to harsh elements outdoors.
If you’re building projects using 2x and bigger stock, Kreg HD Screws are a great choice. They’re made exclusively for use with 1 1/2′ and thicker stock, and are coated to be suitable for indoor and outdoor use.
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