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2. Molly (fastener) - Wikipedia

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

   A machine screw is screwed into the sleeve, causing the anchor to bend, expand, spread and grip against the inside of the hole or behind it (in hollow contexts such as drywall over stud cavities, or hollow doors). [1] Mollies come in various diameters and grip lengths (shank lengths) for different drywall thicknesses and to support different ...

3. Threaded insert - Wikipedia

   en.wikipedia.org/wiki/Threaded_insert

   TIME-SERT insert. A threaded insert, also known as a threaded bushing, is a fastener element that is inserted into an object to add a threaded hole. [1] They may be used to repair a stripped threaded hole, provide a durable threaded hole in a soft material, place a thread on a material too thin to accept it, mold or cast threads into a work piece thereby eliminating a machining operation, or ...

4. List of DIN standards - Wikipedia

   en.wikipedia.org/wiki/List_of_DIN_standards

   internal drive pipe plugs for the sealing of holes with cylindrical internal threads: Active: DIN 908: Hexagon socket screw plugs with parallel screw thread: Active: DIN 910: Hexagon-duty hexagon head screw plugs: Active: DIN 911: Hexagon Socket Screw Keys: Withdrawn: DIN ISO 2936: ISO 2936: DIN 912: Hexagon socket head cap screws (modified ...

5. Screw - Wikipedia

   en.wikipedia.org/wiki/Screw

   A wood screw is a metal screw used to fix wood, with a sharp point and a tapered thread designed to cut its own thread into the wood. Some screws are driven into intact wood; larger screws are usually driven into a hole narrower than the screw thread, and cut the thread in the wood.

6. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   self-drilling screw Tek screw: Similar to a sheet metal screw, but it has a drill-shaped point to cut through the substrate to eliminate the need for drilling a pilot hole. Designed for use in soft steel or other metals. The points are numbered from 1 through 5; the larger the number, the thicker metal it can go through without a pilot hole.

7. Self-tapping screw - Wikipedia

   en.wikipedia.org/wiki/Self-tapping_screw

   A self-tapping screw is a screw that can tap its own hole as it is driven into the material. More narrowly, self-tapping is used only to describe a specific type of thread-cutting screw intended to produce a thread in relatively soft material or sheet materials, excluding wood screws .