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The terms "Allen wrench" (American English) and "Allen key" (British English) are derived from the Allen brand name and refer to the generic product category "hex keys". W.G. Allen filed the first related patent in 1909 for its recessed hex-driven safety screws, a safety improvement over fasteners which protruded from machinery. While other hex ...
A hex key (also, hex wrench, Allen key and Allen wrench or Inbus) is a simple driver for bolts or screws that have heads with internal hexagonal recesses ( sockets ). Hex keys are formed from a single piece of hard hexagonal steel rod, having blunt ends that fit snugly into similarly shaped screw sockets. The rods are bent to 90ΒΊ, forming two ...
Technical documents Control code Yes Yes Yes HyperText Markup Language (HTML) Hypertext documents SGML: Tag Yes Yes: Yes Lilypond: Music notation: Control code Yes Yes Maker Interchange Format (MIF) Technical documents Tag Yes Yes Markdown: Formatted Technical documents, Hypertext documents, E-mail: Text E-mail conventions Tag Yes Yes Yes
Enriched text β for formatting e-mail text. GML. Generalized Markup Language (GML) Geography Markup Language [4] [5] (GML) Gesture Markup Language [6] (GML) Graffiti Markup Language [7] (GML) GNU TeXmacs format [8] β used by the GNU TeXmacs document preparation system. Guide Markup Language (GuideML) β used by the Hitchhiker's Guide site.
This article is a list of standard proofreader's marks used to indicate and correct problems in a text. Marks come in two varieties, abbreviations and abstract symbols. These are usually handwritten on the paper containing the text. Symbols are interleaved in the text, while abbreviations may be placed in a margin with an arrow pointing to the ...
dowel screw. hanger bolt. handrail bolt. Similar to a wood screw but with two pointed ends and no head, used for making hidden joints between two pieces of wood. A hanger bolt has wood screw threads on one end and machine threads on the other. A hanger bolt is used when it is necessary to fasten a metal part to a wood surface.
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List of screw drives. At a minimum, a screw drive is a set of shaped cavities and protrusions on the screw head that allows torque to be applied to it. [1] [2] Usually, it also involves a mating tool, such as a screwdriver, that is used to turn it. Some of the less-common drives are classified as being "tamper-resistant".