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2. Set screw - Wikipedia

   en.wikipedia.org/wiki/Set_screw

   A set screw is often headless and threaded along its entire length, so that it will sit entirely inside that hole; in which case it may be called a grub screw or blind screw. Once fully and firmly screwed into the first object, the projecting tip of the set screw presses hard against the second object, acting like a clamp .

3. Door handle - Wikipedia

   en.wikipedia.org/wiki/Door_handle

   This is an accepted version of this page This is the latest accepted revision, reviewed on 21 January 2025. Device to open or close door Various examples of door handles throughout history A door handle or doorknob is a handle used to open or close a door. Door handles can be found on all types of doors including: exterior doors of residential and commercial buildings, internal doors, cupboard ...

4. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   The set screw is driven through a threaded hole in the rotating part until it is tight against the shaft. The most often used type is the socket set screw, which is tightened or loosened with a hex key. shoulder bolt shoulder screw: stripper bolt: A shoulder screw differs from machine screws in that the shank is held to a precise diameter ...

5. Locking pliers - Wikipedia

   en.wikipedia.org/wiki/Locking_pliers

   Locking pliers being used as a substitute knob on an espresso machine. The bolt is used to set the jaws to a size slightly smaller than what is to be gripped. The jaws are then closed on the gripped object. Because of the lever action the jaws move only slightly but with much force. Locking pliers have four advantages:

6. Allen (brand) - Wikipedia

   en.wikipedia.org/wiki/Allen_(brand)

   Originally named Allen Manufacturing Company, the business produced hexagonal set screws and wrenches to fasten them. The terms "Allen wrench" (American English, though "Allen key" is also common in the US) and "Allen key" (British English) [ 3 ] are derived from the Allen brand name and refer to the generic product category " hex keys ".

7. Screw mechanism - Wikipedia

   en.wikipedia.org/wiki/Screw_mechanism

   It consists of a threaded shaft through a threaded hole in a stationary mount. When the crank on the right is turned, the shaft moves horizontally through the hole. The screw is a mechanism that converts rotational motion to linear motion, and a torque (rotational force) to a linear force. [1] It is one of the six classical simple machines.