Allen Socket Set Screws Knurled Cup Head Hex Drive Chrome Plated

Allen socket set screws are the most common type of set screws with a 6 sided hex in one end with threads extending over the whole length of the screw. The Hex Socket offers the user the ability to have easy adjustment without slippage. They also allow for high torquing on the screws so as to hold objects tighter in place. The most common examples are securing a pulley or gear to a shaft. Set screws are usually headless (also called blind), meaning that the screw is fully threaded and has no head projecting past the major diameter of the screw thread. If a set screw has a head, the thread will extend all the way to the head (whereas a bolt might have an unthreaded shank between the head and thread). A blind set screw (known in the UK as a grub screw, quite possibly from its figurative resemblance to a soil-dwelling grub) is almost always driven by an internal-wrenching drive, such as a hex socket (Allen), star (Torx), square socket (Robertson), or slot. The set screw passes through a threaded hole in the outer object and is tightened against the inner object to prevent it from moving relative to the outer object. It exerts compressional or clamping force through the bottom tip that projects through the hole. Ever Hardware provides custom-made fasteners and customizable packaging.
A potentiometer knob with a set screw for locking it in place.
An example application is when a set screw is screwed into a pulley hub so that its end-point bears firmly against the shaft. The fastening action is by friction between the screw and the shaft, often (but not always) with some amount of elastic or plastic deformation of one or both.

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