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Screws and nails


Screws Available in a range of different shapes and sizes to meet different needs. Wood screws are tapered but machine screws have parallel edges.
Name the different type of screw heads 1. Round head 2. flat head 3. raised head
Describe what the round head screw is used for fixing materials together. Countersunk holes are not used. Nice if made out of Brass.
Describe what the flat head screw is used for For general wood working. E.g. hinges on doors. Tightened flush to material. First a countersunk hole + pilot hole is drilled through the materials.
What are the different types of slots? 1. Slotted 2. Pozi drive 3. Phillips
Self tapping screws Self tapping screws (i.e that need no pilot hole) have a screw thread that runs into the head.
Nails Available in a huge range of sizes and with different shapes of head and pin.
Panel Pins Small and easy to hammer in.
Dovetail nailing Increases strength because the nails are hammered in a dovetail joint style shape way.
Oval nails Are for larger jobs.
Clout nails They have a large flat head and are galvenised.
Created by: supercars
Popular Engineering sets




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