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2. Threaded insert - Wikipedia

   en.wikipedia.org/wiki/Threaded_insert

   TIME-SERT insert. A threaded insert, also known as a threaded bushing, is a fastener element that is inserted into an object to add a threaded hole. [1] They may be used to repair a stripped threaded hole, provide a durable threaded hole in a soft material, place a thread on a material too thin to accept it, mold or cast threads into a work piece thereby eliminating a machining operation, or ...

3. Stem (bicycle part) - Wikipedia

   en.wikipedia.org/wiki/Stem_(bicycle_part)

   The quill stem requires the threaded steerer tube of the fork to extend up through the headset but not protrude beyond it. The quill stem fits down into the inside of the top of steerer tube and is held in place by either a wedge-shaped nut and bolt or a cone-shaped expander nut and bolt. [2]

4. Headset (bicycle part) - Wikipedia

   en.wikipedia.org/wiki/Headset_(bicycle_part)

   Threaded headsets are used with forks that have a threaded steerer tube and are the traditional type (as shown in the above picture). There are eight parts in a threaded headset (from bottom to top): crown race , lower bearings, lower frame cup (pictured as "lower head-tube race"), upper frame cup (pictured as "upper head-tube race"), upper ...

5. Galling - Wikipedia

   en.wikipedia.org/wiki/Galling

   Threaded inserts of hardened steel are often used in metals like aluminium or stainless steel that can gall easily. [3] Galling requires two properties common to most metals, cohesion through metallic-bonding attractions and plasticity (the ability to deform without breaking).

6. AN thread - Wikipedia

   en.wikipedia.org/wiki/AN_thread

   The AN thread (also A-N) is a particular type of fitting used to connect flexible hoses and rigid metal tubing that carry fluid. It is a US military-derived specification that dates back to World War II and stems from a joint standard agreed upon by the Army Air Corps and Navy, hence AN.

7. Aluminium joining - Wikipedia

   en.wikipedia.org/wiki/Aluminium_joining

   Aluminium alloys are often used due to their high strength-to-weight ratio, corrosion resistance, low cost, high thermal and electrical conductivity.There are a variety of techniques to join aluminium including mechanical fasteners, welding, adhesive bonding, brazing, soldering and friction stir welding (FSW), etc. Various techniques are used based on the cost and strength required for the joint.