Screws Bolts

We are fasteners specialist that produce customized and specialized fasteners.

Hex Socket Set Screws

A set screw is a type of screw used to secure an object within or against another object. 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. A blind set screw (also called grub screw) 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.

Example of 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 with some amount of elastic or plastic deformation of one or both.

Common points include the following:

·        Flat point

·        Domed point

·        Cone point

·        Cup point

·        Knurled cup point

·        Extended point (pilot point, dog point)

Common Drive Types:

·        Straight slot

·        Hex socket

·        Square socket

·        External hex

·        External square

·        Bristol spline

Download E-catalog (PDF)