Fasteners called shoulder screws or shoulder bolts have a cylindrical, unthreaded part in the middle. They are strong and have a diverse design, making them suitable for a range of uses. Continue reading to discover more about the various shoulder screws and their applications.

What is Shoulder Screw?

Because of its durability, versatility, and flexibility, a shoulder screw is a type of fastener utilised in industrial settings. It comprises of a threaded body and a shoulder head with a defined length that is cylindrical. The shoulder's width and diameter make sure it offers the best grip for a snug fit when utilised with other industrial parts or accessories. Shoulder screws are frequently used as universal spherical joints to attach two pieces together and allow movement. This has various applications in manufacturing and construction, including joining rods or pipes so they can pivot or spin. Because of its smaller diameter, the shoulder is a great option for rotary applications that require low height and wide movements. Shoulder screws have a wide range of advantages, including resistance to corrosion and the ability to be heat treated to boost strength, making them an indispensable tool in the engineering field.

Shoulder Screw Types

Hex, slotted, and socket heads are the three basic types of shoulder screws. While slotted and hex head shoulder screws are exclusively available in imperial sizes, socket head shoulder screws are available in both metric and imperial sizes. Your application needs will determine the kind of screw you select.

Shoulder Screw Uses

Because to their adaptability, shoulder screws can be applied in a variety of situations. They are frequently employed as pivot points in assemblies where bushings must be firmly held in place while rotation is required. They can also be utilised as support pins or shafts for levers, rollers, and other parts that need to move or rotate often. By serving as mounting studs, they also offer a safe way to place electrical components to a circuit board or panel mount, such as switches, motors, relays, or sensors. Shoulder screws can also be used to tightly join two components without allowing them to freely spin with respect to one another.


Shoulder screws have several advantages because of their special design, which enables them to easily fit into small locations while providing exceptional strength at the same time. Shoulder screws will do the trick whether you need them for electrical parts, levers and rollers, or just basic assembly! Given all these advantages, it's understandable why they have grown to be so well-liked throughout time. Shoulder screws are the best option if you want to effectively fasten two pieces together without allowing them to freely rotate.