M3x12mm Round Head Nylon Machine Screw Bolt Fastener Black 100pcs

Machine screws are threaded fasteners that are typically used with nuts or drilled and tapped holes. They are available with a variety of head shapes which determine how the screw interacts with the mating surface and drive styles which determine the type of driver required to install and remove the screw. Widely used in electronics communication electric power products cultural goods environmental protection machinery etc.