Shoulder screws feature a socket head, a close tolerance body and a threaded portion smaller than the body. The area under the head may be undercut so that the head will seat on the work surface. The threads may be undercut so that a nut will go all the way to the end of the shoulder. Shoulder screws are often referred to as “Stripper Bolts”.
Nickel Systems stocks socket head should screws in various sizes & materials. Use our specifications and technical data below to select your specific screw for your next project.
A socket head shoulder screw is a type of fastener with a cylindrical, precision-ground shoulder and a recessed hexagonal drive, used to accurately locate or pivot parts in assemblies. It is a specialty design for applications requiring precise alignment or rotation of moving parts.
Parts of a Shoulder Head Screw:
Socket Head: The head has an internal hex drive (also called a hex socket), allowing installation with an Allen wrench or hex key. It is designed for applications requiring a clean, recessed look or limited access space.
Shoulder (or Shank): The defining feature is a precision-ground, unthreaded shoulder between the head and the threaded portion. The diameter of the shoulder is usually larger than the thread. The length of the shoulder is specified and varies depending on the application.
Shoulder Neck: These screws can be necked under the head as shown below. The neck often has a smaller diameter than the shoulder and has a radius transition to the head of the screw.
Threaded Portion: This is located at the end of the screw. It usually has a smaller diameter than the shoulder.
Thread Neck: The thread neck should allow the should to seat against the face of a standard basic GO thread ring gage. This means that the neck should have a narrow diameter that does not impede a thread gage from sliding over it in order to meet the shoulder’s face.
Check out our parts picture below:
Applications of Socket Head Shoulder Screws
Pivot Points in Moving Assemblies
Use case: The shoulder acts as a shaft around which parts can pivot or rotate.
Examples: Robotic arms, levers or mechanical linkages, & door hinges in precision equipment
Nickel Systems provides high quality exotic grade materials that hold up in the toughest, most severe heat and corrosive environments. With our large inventory of specialty fasteners in stock, we are always ready to answer the call to serve the most challenging applications.
