An electrical switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another..
Especially useful in metal-to-metal or where heavy duty fastening is required. Machine screws are used in fastening nearly all types of hard materials..#10-32 x 1/4 in Phillips Pan Machine Screw, Zinc Plated Steel, 100 PK Commonly used with flat or lockwashers.