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2. Hillman Solutions - Wikipedia

   en.wikipedia.org/wiki/Hillman_Solutions

   Hillman acquired Serv-A-Lite, another distributor of fasteners and related hardware. Serv-A-lite was established in 1979 and based in East Moline, Illinois. The Servalite trademark is now applied to some electric lamp hardware. Hillman bought a sizeable Canadian rival distributor H. Paulin for $103 million in February 2013 [17] [18]

3. 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 ...

4. Core plug - Wikipedia

   en.wikipedia.org/wiki/Core_plug

   The Welch plug is a type of core plug that is made from a thin disc of metal. The Welch plug is dome-shaped and inserted into the casting hole with the convex side facing outwards. [6] When installed by striking the Welch plug with a hammer, the dome collapses slightly, expanding it laterally to seal the hole.

5. Friction drilling - Wikipedia

   en.wikipedia.org/wiki/Friction_drilling

   The basic steps in the friction drilling process: A.Applying pressure. B.Tool heats target and melts through it. C.Screw thread tapping. Friction drilling is a method of making holes in metal in which the material is pushed out of the way with the aid of heat from friction.

6. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   A countersink is a conical hole cut into a manufactured object; a countersink bit (sometimes called simply countersink) is the cutter used to cut such a hole. A common use is to allow the head of a bolt or screw, with a shape exactly matching the countersunk hole, to sit flush with or below the surface of the surrounding material.

7. Weld access hole - Wikipedia

   en.wikipedia.org/wiki/Weld_access_hole

   The weld access hole or rat hole is a structural engineering technique in which a part of the web of an I-beam or T-beam is cut out at the end or ends of the beam. The hole in the web allows a welder to weld the flange to another part of the structure with a continuous weld the full width on both top and bottom sides of the flange.