PRODUCT SPECIFICATIONSPart #: 0000-202758Fastener Type: Machine Screw Phillips Flat HeadSize Description: M2 x 0.40 x 4Diameter/Nominal Size: M2Length: 4Wrench Size/Across Flats: PH#1Head Diameter: 3.50-3.80MMHead Height: 1.20MMThread Pitch: 0.40Thread Pitch Type: CoarseThread Direction: RightThread Coverage: FullSystem of Measurement: MetricMaterial: Low Carbon SteelFinish: Black OxideHead Type: FlatDrive Type: PhillipsStandards Met: DIN 965 / ISO 7046Average Piece Weight: 0.0002000 lbs.Machine screws have a uniform diameter the entire length of the shaft as opposed to tapered screws which have a pointed tip; are primarily used to fasten machine components, appliances and many more.