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  2. List of screw and bolt types - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_and_bolt_types

    The screw itself should be drilled a minimum of 1" into the concrete to hold effectively and a maximum of 1-3/4" or the threads will wear and will lose holding power. Ideally 1-1/4" to 1-1/2" of screw thread in the concrete. [1] So for example, if a 1/2" board is being screwed onto the concrete, a 1-3/4" to 2" concrete screw should be used ...

  3. Robertson screw - Wikipedia

    en.wikipedia.org/wiki/Robertson_screw

    Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken. [3]: 85–86 They also allow the use of angled screwdrivers and trim-head screws. The socket-headed Robertson screws are self-centering and reduce cam out. They also stop a power tool when set, and can be more easily ...

  4. List of screw drives - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_drives

    Pozidriv screws have a set of radial indentations (tick marks) set at 45° from the main cross recess on the head of the screw, which makes them visually distinct from Phillips screws. [ 11 ] While a Phillips screwdriver has slightly tapered flanks, a pointed tip, and rounded corners, a Pozidriv screwdriver has parallel flanks, a blunt tip, and ...

  5. Nut driver - Wikipedia

    en.wikipedia.org/wiki/Nut_driver

    An Easco spinner handle with a detachable 14 in (6.35 mm) socket attached. A nutdriver or nut driver is a hand tool for tightening or loosening nuts and bolts . It essentially consists of a socket attached to a shaft and cylindrical handle and is similar in appearance and use to a screwdriver . [ 1 ]

  6. Screwdriver - Wikipedia

    en.wikipedia.org/wiki/Screwdriver

    Screwdriver with rubber handle. The tool used to drive a slotted screw head is called a standard, common blade, flat-blade, slot-head, straight, flat, flat-tip, [6] or "flat-head" [7] screwdriver. This last usage can be confusing, because the term flat-head also describes a screw with a flat top, designed to install in a countersunk hole ...

  7. SK Hand Tools - Wikipedia

    en.wikipedia.org/wiki/SK_Hand_Tools

    SK Hand Tools (styled earlier as S-K, now usually SK) is a tool company located in Sycamore, Illinois, with additional manufacturing facilities in China, Taiwan, and Colorado Springs, Colorado. [1] Outlets for their products include independent tool-truck dealers, auto parts stores, and major internet vendors such as Sears and Amazon.com .