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2. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   The threads on particle board screws are asymmetrical. concrete screw Tapcons masonry screw Confast screw multi-material screw blue screw self-tapping masonry screw Titen: A stainless or carbon steel screw for fastening wood, metal, or other materials to concrete or masonry. Concrete screws are commonly blue in color, with or without corrosion ...

3. ASTM A325 - Wikipedia

   en.wikipedia.org/wiki/ASTM_A325

   Type 1: Medium carbon steel, boron steel, or medium carbon alloy steel; Type 2: Low carbon martensitic steel [7] (withdrawn from the standard in 1991) Type 3: Weathering steel; There is also a T version, which is used to refer to fully threaded bolts. [6] Note that independent of the material the bolt is quenched and tempered. [7]

4. Bolt (fastener) - Wikipedia

   en.wikipedia.org/wiki/Bolt_(fastener)

   Steel fasteners (grade 2,5,8) - the level of strength; Stainless steel fasteners (martensitic stainless steel, austenitic stainless steel), Bronze and brass fasteners - water proof usage; Nylon fasteners - used for the light material and water proof usage. In general, steel is the most commonly used material of all fasteners: 90% or more. [8]

5. Screw - Wikipedia

   en.wikipedia.org/wiki/Screw

   Mild steel bolts have property class 4.6, which is 400 MPa ultimate strength and 0.6*400=240 MPa yield strength. High-strength steel bolts have property class 8.8, which is 800 MPa ultimate strength and 0.8*800=640 MPa yield strength or above. The same type of screw or bolt can be made in many different grades of material.

6. ISO 898 - Wikipedia

   en.wikipedia.org/wiki/ISO_898

   6. (Now withdrawn) Nuts with specified proof load values – Fine pitch thread [7] 7. Torsional test and minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm [8] With exception to part 7, which defines test standards, the parts of this standard define properties for fasteners made of carbon steel and alloy steel.

7. List of thread standards - Wikipedia

   en.wikipedia.org/wiki/List_of_thread_standards

   A screw thread is an inclined plane wrapped around a cylinder or cone in the form of a helix, with the former being called a straight thread and the latter called a tapered thread. More screw threads are produced each year than any other machine element. [1] Threads are generally produced according to one of the many standards of thread systems.