M8-1.25 Hex Socket Flat Point Set Screw DIN 913 Steel Black Oxide 45H Grade 12.9

Description

M8-1.25 Hex socket flat point set screw is a type of set screw with a 3mm diameter of thread that generally used to secure an object within or against another object, normally not using a nut. Metric DIN 913 hexagon socket set screws with a flat point is headless and fully threaded screws with an internal hexagonal drive at one end and a flat surface at the other. They are to be inserted through pre-drilled aligned holes and used to reset or relocate hard shafts. 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 with 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 an M8-1.25 hex socket flat point 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.