Sems Fasteners

A SEMS screw, or “SEMS fastener,” is a type of screw that comes with a pre-assembled washer, or sometimes multiple washers, as part of the same component. The term “SEMS” stands for “Screw with External Mating Surface.” The advantage of SEMS screws is that they simplify assembly by reducing the number of parts and ensuring that the washer is always properly aligned with the screw, which can improve the efficiency and reliability of the fastening process. They are commonly used in various applications where ease of assembly and a secure fit are important.