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Timber Products and Furniture Technologies (HSC ). Hardware and Fittings. Screws.
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Timber Products and Furniture Technologies (HSC) Hardware and Fittings
Screws • Woodscrews are primarily used for joining wood to wood, the clamping force they provide creates an extremely strong joint that is also easily dismantled. They are used for attaching fittings such as hinges, locks and handles. Most general purpose woodscrews are made of steel, which is sometimes case hardened for extra strength. Brass screws are more decorative and stainless-steel screws have a high resistance to corrosion even outdoors. Steel screws are coated with zinc to prevent corrosion, and chrome plating and black japanning are used as decorative coatings. • http://en.wikipedia.org/wiki/Screw • The cylindrical portion of the screw from the underside of the head to the tip is known as the shank; it may be fully threaded or partially threaded. • The distance between each thread is called the "pitch". • a) Pan, b) Dome (button), c) Round, d) Truss (mushroom), e) Counter sunk, f) Oval raised head. • Screw heads. http://en.wikipedia.org/wiki/Screw_drive