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2. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   Inch-sized wood screws in the U.S. are defined by ANSI-B18.6.1-1981(R2003), while in Germany they are defined by DIN 95 (Slotted raised countersunk (oval) head wood screws), DIN 96 (Slotted round head wood screws), and DIN 97 (Slotted countersunk (flat) head wood screws). Security head screw: These screws are used for security purposes and ...

3. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   A hex screw drive uses six-sided fastener heads, and the fastener is known as a hex head cap screw. It can be turned with an adjustable wrench, combination wrench and 6- or 12-point sockets. The hex drive is better than square drive for locations where surrounding obstacles limit wrenching access, because smaller wrench-swing arcs can still ...

4. File:Screw Head - Double Hex. Triple Square. 12-Spline Flange ...

   en.wikipedia.org/wiki/File:Screw_Head_-_Double...

   120° Double Hex screw head. 90° Triple Square screw head. 60° 12-Spline Flange screw head. Date: 9 March 2024: Source: Own work: Author: Andrew Pertsev: Licensing.

5. File:Screw Head - 12-Spline Flange.svg - Wikipedia

   en.wikipedia.org/wiki/File:Screw_Head_-_12...

   Diagram of a screw head - Spline drive (12 splines) Date: 14 July 2009: Source: Own work: ... 60° 12-Spline Flange. this file, 12-Spline Flange . SVG development .

6. Sex bolt - Wikipedia

   en.wikipedia.org/wiki/Sex_bolt

   A sex bolt is a type of fastener comprising a mated pair of screw and post, which are a machine screw and a nut that is barrel-shaped. The nut has a flange and a protruding boss that is internally threaded. The bolt (mated pair, screw and post) sits within the components being fastened, and the flange provides the bearing surface.

7. 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 ...