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2. List of commercially available roofing materials - Wikipedia

   en.wikipedia.org/wiki/List_of_commercially...

   Standing-seam metal roof with concealed fasteners. Mechanically seamed metal with concealed fasteners contains sealant in seams for use on very low sloped roofs, suitable for roofs of low pitch such as 0.5/12 to 3/12 pitch. Flat-seam metal with or without soldered seams. Steel coated with a coloured alloy of zinc and aluminium. Stone-coated ...

3. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   Drywall screws designated as fine are the most common screws to use the twinfast style of threads. [5] wood screw: A metal screw with a sharp point designed to attach two pieces of wood together. Wood screws are commonly available with flat, pan, or oval-heads. A wood screw generally has a partially unthreaded shank below the head.

4. Staple (fastener) - Wikipedia

   en.wikipedia.org/wiki/Staple_(fastener)

   A staple (from which the paper fastener was developed) A staple is a type of two-pronged fastener, usually metal, used for joining, gathering, or binding materials together. Large staples might be used with a hammer or staple gun for masonry, roofing, corrugated boxes and other heavy-duty uses.

5. Molly (fastener) - Wikipedia

   en.wikipedia.org/wiki/Molly_(fastener)

   Figure 1 of the original patent for the molly bolt, U.S. Patent No. 2,018,251. The molly bolt was patented in 1934 by George Frederick Croessant. [3] Although his patent acknowledges that expandable fasteners of this general kind were already known, Croessant's patent is intended to provide "an improved and adequate anchoring grip that may be retightened if necessary and that will permit ...

6. Bolt (fastener) - Wikipedia

   en.wikipedia.org/wiki/Bolt_(fastener)

   Steel fasteners (grade 2,5,8) - the level of strength; Stainless steel fasteners (martensitic stainless steel, austenitic stainless steel), Bronze and brass fasteners - water proof usage; Nylon fasteners - used for the light material and water proof usage. In general, steel is the most commonly used material of all fasteners: 90% or more. [8]

7. Self-tapping screw - Wikipedia

   en.wikipedia.org/wiki/Self-tapping_screw

   Self-tapping screws can be divided into two classes: [3] those that displace material (especially plastic and thin metal sheets) without removing it, known as "thread-forming" self-tapping screws, and self-tappers with sharp cutting surfaces that remove the material as they are inserted, termed "thread-cutting" self-tapping screws.