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The stainless steel machine screw has a plain finish and a cheese head with a slotted drive. Stainless steel resists corrosion and may be magnetic. The slotted drive has a linear slot for use with a flat-blade driver. The cheese head has a flat top, rounded sides, and a high profile that holds a deep drive slot for high driving force.Machine screws are threaded fasteners that are typically used with nuts or drilled and tapped (threaded) holes. Machine screws 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.