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2. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   They are usually made of low grade steel, have a slot or Phillips drive, and are used to join sheet metal parts using a hex or square nut. [12] plow bolt: plough bolt: A plow bolt is bolt similar to a carriage bolt, except the head is flat or concave, and the underside of the head is a cone designed to fit in a countersunk recess.

3. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   Either method leaves only a smooth bolt head exposed. This type of bolt is commonly used with prison door locks, automobile ignition switches, and street signs, to prevent easy removal. An alternative design leaves a low-profile button head visible after installation. [74] In addition to breakaway bolts, breakaway nuts of similar design are ...

4. List of named alloys - Wikipedia

   en.wikipedia.org/wiki/List_of_named_alloys

   Bronze (tin, aluminum or other element) Aluminium bronze ; Arsenical bronze (arsenic, tin) Bell metal ; Bismuth bronze ; Brastil (alloy, bronze) [5] [6] Florentine bronze (aluminium or tin) Glucydur (beryllium, iron) Guanín (gold,silver) Gunmetal (tin, zinc) Phosphor bronze (tin and phosphorus) Ormolu ; Silicon bronze (tin, arsenic, silicon)

5. Screw - Wikipedia

   en.wikipedia.org/wiki/Screw

   A lathe of 1871, equipped with leadscrew and change gears for single-point screw-cutting A Brown & Sharpe single-spindle screw machine. Fasteners had become widespread involving concepts such as dowels and pins, wedging, mortises and tenons, dovetails, nailing (with or without clenching the nail ends), forge welding, and many kinds of binding with cord made of leather or fiber, using many ...

6. List of copper alloys - Wikipedia

   en.wikipedia.org/wiki/List_of_copper_alloys

   Screws, nuts, gears, keys Nickel silver (ASTM B122) Cu 65.0, Zn 17.0, Ni 18.0 Annealed 25 58 40 70 Hardware Cold-rolled 70 85 4 170 ... Silicon bronze: 878: B30: 878:

7. FEMA employee fired for telling aid workers to avoid homes ...

   www.aol.com/fema-says-employee-fired-telling...

   The employee, who was not named, was fired from her position, Administrator Deanne Criswell said in a post to social media on Saturday.