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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. Yankee screwdriver - Wikipedia

    en.wikipedia.org/wiki/Yankee_screwdriver

    Stanley UK subsequently introduced Pozidriv screwdriver tips in various sizes (PZ#1 to PZ#3 in 5/16" and 9/32" shank models, PZ#1 and PZ#2 sizes only for the 7/32" shank models) slot screwdriver tips with the centring sleeve feature, and; extra-long screwdriver tips for special applications.

  4. 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 ]

  5. 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 ...

  6. United States Standard thread - Wikipedia

    en.wikipedia.org/wiki/United_States_Standard_thread

    The thread form is defined by flats at the tip and root of the thread form. This flat length is defined as the pitch divided by eight. The thread depth, which is from flat to flat is 0.6495 times the pitch. [4] For 14-inch (6.4 mm) screws and larger, the pitch is defined as: = +

  7. List of thread standards - Wikipedia

    en.wikipedia.org/wiki/List_of_thread_standards

    Pipe Thread Form ASME B1.20.7-1991 (R2013) Hose Coupling Screw Threads - Inch: Pipe Thread Form ASME B1.21M-1997 (R2013) Metric Screw Threads - MJ Profile: V Thread Form BS 84: Tables of BS Whitworth, BS Fine and BS Pipe Threads: V Thread Form (55°) 14 ″-20 BSW ISO 68-1:1998: ISO general purpose screw threads—Basic profile—Part 1 ...