Socket Head Bolt A socket screw (also known as hex head cap screws) is a type of fastener with a cylindrical, barrel-shaped head that’s typically a little larger and more bulbous than standard caps. This design allows for increased load-bearing surface and helps to resist loosening. They’re used in applications where there isn’t enough room to manoeuvre a wrench head bolt, such as when assembling close-tolerance machinery.
Socket screws are available in a wide range of head styles, materials and sizes. Some types are better suited to certain environments than others, which is why it’s important to understand your options and select the best fastener for the job.
Some types of socket head screws, such as those with a nylon patch, offer additional locking strength that prevents them from loosening due to vibration or other factors. When tightened, the nylon pellet compresses against the threads and creates a strong frictional force that holds the screw in place. These are often used for shaft collars, knobs on machines and equipment, and other components that require frequent adjustments.
In addition to proper installation, it’s crucial to maintain proper care of socket head screws to avoid damage and premature wear or loss of functionality. This includes regular inspections and lubrication. The former prevents corrosion that can weaken the screw and cause it to become loose or damaged during use, while the latter reduces friction between the threads and head to decrease the risk of stripping and seizing.