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2. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   A 5-point can drill through 0.5 in (12.7 mm) of steel, for example. self-tapping machine screw: A self-tapping machine screw is similar to a machine screw, except the lower part of the shank is designed to cut threads as the screw is driven into an untapped hole.

3. 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.

4. Fastener - Wikipedia

   en.wikipedia.org/wiki/Fastener

   B18.6.1 Wood Screws (Inch Series) B18.6.2 Slotted Head Cap Screws, Square Head Set Screws, And Slotted Headless Set Screws (Inch Series) B18.6.3 Machine Screws, Tapping Screws, and Metallic Drive Screws (Inch Series) B18.18 Quality Assurance For Fasteners; B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products

5. 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 ...

6. Pocket-hole joinery - Wikipedia

   en.wikipedia.org/wiki/Pocket-hole_joinery

   Self-tapping pocket screws are used for pocket hole joints. Pocket screws are generally more expensive, but they are needed for a tight, strong joint. Pocket screws have a wide washer head to spread the load for a firm bond, and prevent screwing too far into the joint and cracking the wood.

7. Confirmat screw - Wikipedia

   en.wikipedia.org/wiki/Confirmat_screw

   Ordinary wood screws do not hold well in particleboard, which is much weaker than wood. They tend to tear out. [6] Confirmat screws have about twice the shank diameter of a woodscrew. Drywall screws, while half the price of confirmat screws, do not hold as well in particleboard-like materials, and cannot be removed and re-inserted.