Screw Chart includes: Metric and English Screw Selector & Tapping Drilled Hole Tolerances (Inch & Metric) Tap, Drill, and Stress Area for Metric Screws Metric Shoulder Screws Imperial (Inch) Screws C'Bore for Imperial (Inch) Socket Head Cap Screws Imperial (Inch) Shoulder Screws Imperial (Inch) and Metric Clearance Holes Pipe Sizes and Tapping Surface Texture/Surface Finish (N Grade) Prefixes Rulers (English & Metric) Hardness/Tensile Conversion Amperage Conversion Beam Deflection Equations 1° and 1/4° Draft Angle (inches/mm) Statistics Equations Wrench Clearances (Inch) Thermoplastic Properties Sheet Metal and Wires Sizes Sheet Metal Bending Allowances Carbon and Alloy Steel Numbering System Actual Pipe Size Comparison Units Conversions Constant Acceleration Equations Shore Durometer Fractions to inches to mm SinØ, CosØ, & TanØ Equations General Engineering Equations Moment of Inertia Formulas Geometric Tolerances Welding Symbols Densities of Common Materials Bolt Grades Spring Pins (Inch & Metric) Metric Drill Sizes Allen Key Sizes for Metric Screws Metric Screws - Nearest to Imperial (Inch) size C'Bore Sizes for Metric Socket Head Cap Screws Fractional (Inch) Drill Sizes Allen Key Sizes for Imperial (Inch) Screws Tap, Drill, and Stress Area for Imperial (Inch) Screws Fractions to Millimeters to Decimal Miniature Screws Basic Electrical Equations Pipe Threads (Metric & English/Imperial) Drafts (per linear Inch) Numbering System for Carbon and Alloy Steels