Shoulder screw as know as shoulder bolt,  are types of fasteners that have a cylindrical shoulder between the head and the threaded portion. The shoulder has a larger diameter than the threaded section.

Round head torx shoulder screws, round head cross shoulder screws and round head hexagonal shoulder screws are our common shoulder screw. So what is the function of shoulder screws?

Connection: The main function of shoulder screw is connection. In industry, construction, aviation and other fields, shoulder screw are widely used to connect two objects together, which can be structures, equipment, machines or other components.

Supporting: Shoulder screw can also be used to support objects. For example, in the field of construction, shoulder screw can fix stairs to the ground to provide people with safe walking facilities; in the field of aviation, shoulder screw can support and fix accessories such as wings and flaps and the fuselage to ensure aircraft flight.

Fixing: Shoulder screw can also be used to fix objects. For example, in the automobile manufacturing process, shoulder screw can fix the chassis and body together to ensure that the car is safe and stable; in the ship manufacturing process, shoulder screw can fix the hull structure and bear the stress of the hull.

Additionally, shoulder screw can also serve as a spacer or standoff, creating a gap or distance between two components while still providing a secure fastening connection.