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|TYPES OF SCREWS -2|
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|Screws are often used to join materials, such as chipboard, MDF and natural woods. There is a type of screw called a 'self-tapping' screw, that can be used to join metal sheet. Screws are ideal for joining materials either permanently of temporarily.|
|RAISED HEAD SCREW:Used to fit door handle plates and decorative features that must look good.|
|DOME HEAD SCREW: Can be used for fitting fixtures such as mirrors. The 'cap', which is the dome shape is usually chromed or made from brass and this can be a good feature. It also makes the head of the screw safe as the doom has no sharp edges to catch and cut hands/fingers.|
|CHIPBOARD SCREWS: The thread on this type of screw extends all the way along the length. It is best used with chipboard|
|SELF-TAPPING SCREWS: these are normally used to cut a thread in metal. A hole is drilled in the metal, a fraction smaller than the width of the screw. The self-tapping screw is then turned into the hole cutting a thread.|
|Used in conjunction with wood screws and self tapping screws. They give a decorative and neat finish. They are often used to assemble Knock Down furniture.|
|JOINING MATERIALS USING SCREWS|
|1. Mark the position of the screw on the top of the
2. Drill a clearance hole through the top piece - the same diameter as the shank.
3. countersink the hole if using a countersunk screw.
4. Put the two pieces of material together and drill a smaller diameter hole in the second piece of material
5. Place the screw in the top first hole and tighten carefully with a screwdriver.
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