These screws feature 3 anti-corrosion layers to help them resist corrosion in wet areas for the long haul. Zinc-coated screws are suitable for use in kitchens and bathrooms.īlue-Kote™ Kreg Pocket-Hole Screws are the best choice for damp or wet applications, including projects for your porch, patio, detached garage, or outdoor areas. They’re recommended for a wide variety of indoor projects that won’t be subjected to significant amounts of moisture. Zinc-Coated Kreg Pocket-Hole Screws are the ones you’ll use for most projects.

There’s a Kreg Pocket-Hole Screw for either case. If you’re building a project for outdoor living, though, you’ll want a screw that can withstand the rigors of exposure to the elements. Rivets with diameters between 2-20 mm and lengths between 5-50 mm are common for general use. Metric: rivet diameters and lengths are measured in millimeters. If you’re building an indoor project, your project won’t be subjected to moisture. Rivet lengths are also probably expressed in half sizes, and have a dash number such as -3.5 (732 inch) to indicate they are half-size. Next, think about where your project will be used. Will your project live indoors or outdoors? The threads are less aggressive, but there are more of them to ensure great holding power without splitting. For these hardwoods, choose fine-thread Kreg Screws. The aggressive threads tend to tear the wood fibers, resulting in splits in your wood. On the other hand, hardwoods like oak, maple, and cherry are too dense and hard for coarse-thread screws. Coarse-thread screws are also the preferred choice for sheet goods like plywood and MDF.įine-Thread for Hardwoods: Oak, Maple, Cherry, Birch, Ash, Walnut, Mahogany, Hickory Coarse-thread Kreg Pocket-Hole Screws work great for these woods. That means they need a screw with deep, aggressive threads that will bite into those soft fibers. Woods like pine and spruce, for example (known as softwoods), are soft and not very dense. The next question to ask yourself is: What kind of wood you are using to build your project? Softwood, hardwood, or plywood? When you know that, you can choose the correct screw thread type - either coarse or fine thread.Ĭoarse-Thread for Softwoods and Sheet Goods: Pine, Cedar, Fir, Spruce, Poplar, Aspen, Basswood, Butternut, Plywood, Particle Board, MDF, Melamine

Drill bit size chart metric