![]() ![]() The shape of the bugle head allows distribution of the stress over a much wider area than is possible with a flat head screw.īugle headed screws are used to attach plasterboard to wood to metal studs.īutton head, dome head and pan self-tapping screws The bugle head screw features a countersunk head with a flat top and a concave bearing face. Less prone to the head of the screw being compromised and distorted when driving into the material, due to the shape of the driver used. This allows for a flat finish and a smooth result. If you experience stripped threads you should use a larger thread-tapping screw when reattachment is made.Ĭountersunk or flat head self-drilling screwsĪllows for a flush finish as the head of the screw sits below the surface of the surrounding material. The drawbacks to using this type of screw is when they are removed it can result in stripped threads. Thread-tapping screws remove material and create a path for the screw. Remember to make the pilot hole smaller than the diameter of the thread tapping screw. Thread-Tapping: These screws do not require a pilot hole but one can be drilled to make fastening easier. Care should be taken as there is a risk of over-tightening the screw, which can result in joined materials breaking from the pressure. Due to their design they typically grip material more tightly. Thread-forming screws are usually used to join plastic materials together. Thread-forming: Before you can use these screws you will need to drill a pilot hole as the screw itself does not contain a pointed tip. There are two types of self-tapping screws, thread-forming and thread-cutting. Self-tapping screws are typically used to secure wood, plastic, metal and brick together. The action of driving the screw in will result in the self-tapping screw cutting a thread into the material and securing the materials together. Pointed nose self-tapping screws do not require a pilot hole. Blunt nose and flat ended Self-tapping screws require a pilot hole slightly smaller than the screw diameter to be created before they can be driven into the material with a screwdriver. ![]()
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