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2. Speed nut - Wikipedia

   en.wikipedia.org/wiki/Speed_nut

   When the fastener is tightened, the base of the nut, which is arched, elastically deforms and applies a force to the fastener, which locks it from loosening under vibrations. [1] There are many different types of speed nuts, mostly dependent on the shape of the nut, how it attaches to the workpiece, and what type of screw can be used.

3. Nut (hardware) - Wikipedia

   en.wikipedia.org/wiki/Nut_(hardware)

   Clip-on nut: J-nut or U-nut, sheet metal nut, speed nut (ambiguously) Designed to be clipped to sheet metal Coupling nut: Extension nut A threaded fastener for joining two male threads, most commonly a threaded rod,[1][2] but also pipes Flange nut: Collar nut Has a wide flange at one end that acts as an integrated washer HARDLOCK Nut [3]

4. Clip-on nut - Wikipedia

   en.wikipedia.org/wiki/Clip-on_nut

   A U-nut is very similar to a J-nut except that both legs are the same length. Because of this a retaining clip is usually formed on the leg without the threads. This helps keep the nut in place while not screwed down. The thread may be of a speed nut style, integrated nut, or have an extruded portion that is tapped. There are "standard" and ...

5. Locknut - Wikipedia

   en.wikipedia.org/wiki/Locknut

   A locknut, also known as a lock nut, locking nut, self-locking nut, prevailing torque nut, [1] stiff nut [1] or elastic stop nut, [2] is a nut that resists loosening under vibrations and torque. Prevailing torque nuts have some portion of the nut that deforms elastically to provide a locking action. [ 2 ]

6. Leadscrew - Wikipedia

   en.wikipedia.org/wiki/Leadscrew

   Safe running speeds for various nut materials and loads on a steel screw [17] Nut material Safe loads (psi) Safe loads (bar) Speed (fpm) Speed (m/s) Bronze 2,500–3,500 psi 170–240 bar Low speed Bronze 1,600–2,500 psi 110–170 bar 10 fpm 0.05 m/s Cast iron 1,800–2,500 psi 120–170 bar 8 fpm 0.04 m/s Bronze 800–1,400 psi

7. Distorted thread locknut - Wikipedia

   en.wikipedia.org/wiki/Distorted_thread_locknut

   As the male fastener reaches the deformed section it stretches the threads of the nut elastically back into a circle. This action increases the friction between the nut and the fastener greatly and creates the locking action. Due to the elastic nature of the deformation the nuts can be reused indefinitely. [2]