This app can be used to calculate different size drills, taps, bolts, screws, and nuts. It is intended for approximate calculations and should be used for reference only. For no ads, purchase full version.
Great reference for machinists, shops, designers, and engineers.
English: #0-80 through 1-1/2-18 (UNC, UNF, UNS, UNEF)
Metric: M1x0.25 through M30x1.5 course and fine
United National Coarse (UNC), United National Fine (UNF), United National Extra Fine (UNEF), United National Special (UNS), Metric Course, Metric Fine, Metric Extra Fine. Handy fraction to decimal drill chart and NPT / NPS pipe thread chart.
Table Chart for Keenserts Keylocking Thread Inserts.