A screw insulator can also be known as a shoulder washer.
The screw insulator is designed to insulate screws, rivets or wire from an assembly.
Features and Benefits of a screw insulator
Thermally insulate a screw from making metal to metal contact
Act as Spacers and Guides
Are Strong and Corrosion Resistant
Can be Used as Seal in Some Applications
Why and when to use a screw insulator?
Screw insulators can be inserted into a housing to provide a bearing surface for rotary applications.
The flange on the screw insulator is used to locate the bushing when it is installed or to provide a thrust bearing surface.
Screw Insulators are used to prevent heat flow through the screw to other parts of the thermal assembly.