PRODUCT SPECIFICATIONSPart #: 0000-201554Fastener Type: Machine Screw 6 Lobe Pan HeadSize Description: M3 x 0.50 x 20 MMDiameter/Nominal Size: M3Length: 20 MMWrench Size/Across Flats: T10Head Diameter: 5.30-5.60MMHead Height: 2.26-2.40MMThread Pitch: 0.50Thread Pitch Type: CoarseThread Direction: RightThread Coverage: FullSystem of Measurement: MetricMaterial: Low Carbon SteelFinish: Zinc PlatedHead Type: PanDrive Type: 6 LobeStandards Met: ISO 7045Average Piece Weight: 0.0025000 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.