What is a SEMS?
SEMS is basically a screw and washer assembly. However the washer is assembled onto a screw blank before the threading operation, thus preventing the washer from being removed and/or falling off.


What does SEMS mean?
The acronym SEMS has no specific meaning, however; in the U.S. the word sems is recognized as a generic term referring to a screw and washer assembly.


Why use a SEMS vs. screw and washer?
In applications where there is a need to fasten and unfasten numerous times, using a SEMS assembly elimnates the possibility of losing or having to replace the washer.


What are the applications of a SEMS?
Sems can be used in unlimited applications, from automotive to electronics. Saves time and money for mass production and special assembly operations.


Can I use more that one washer on a SEMS?
Yes, we offer "2 piece sems" (1 washer) and "3 piece sems" (2 washers).


What is the benefit of two washers vs. one?
In applications when a split washer is used, a flat washer is used to protect the material from being damaged.