There is a list of drill and tap sizes and a chart of the sizes.
The drill bit and tapping tool are often used in sequential to fabricate parts with thread holes, because drilling is a process used to cut a thread inside a hole.There is a drill and tap size chart for reference when it comes to the selection of drill bit sizes.
For fastening the finished part or facilitating the building, holes with screw threads are often required.One way to make thread holes is to drill a hole in the right size with a drill bit and then tap it.To determine the proper tap drill for an existing hole or for a certain thread size, people would need a drill size chart.
The table list standard size drill bits in several measurement systems, including fractional, metric, wire gauge number, and letter, can be found in the drill size chart.The sizes are measured in inches and millimeters.As the wire gauge decreases from #107 to #1, the tool diameter increases and continues from A to Z.The English and Metric equivalents of the diameter are shown.
The tap size chart is a table that lists standard size taps, specifying the diameter and thread spacing for fractional, metric, and screw sizes.The sizes are listed in inches and millimeters.The diameter is larger for a higher screw size.The thread spacing can be coarse or fine.The thread count is used in the fractional and screw size systems.The thread pitch is the distance between threads measured in millimeters.
The chart has tools up to 1.5 inches in diameter, but larger tools are often used.
The equivalent thread pitch is provided and the approximate thread count is shown.Each standard tap size has a recommended tap drill size provided.The drill bit should be used to drill the initial hole.