PRODUCT SPECIFICATIONSPart #: 0000-113434Fastener Type: Machine Screw Phillips Round HeadSize Description: 1/4"-20 x 2 1/4" (FT)Diameter/Nominal Size: 1/4"Length: 2 1/4"Wrench Size/Across Flats: PH#3Head Diameter: 0.443-0.472"Head Height: 0.160-0.175"Thread Pitch: 20Thread Pitch Type: CoarseThread Direction: RightThread Coverage: FullSystem of Measurement: InchMaterial: Low Carbon SteelFinish: Zinc PlatedHead Type: RoundDrive Type: PhillipsAverage Piece Weight: 0.0277800 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.