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nominal diameter major diameter pitch (in) pitch (mm) tap drill size (inch) major diameter (mm) tpi #12 1⁄4 5⁄16 3⁄8 7⁄16 1⁄2 9⁄16 5⁄8 3⁄4 7⁄8 1 0.216 0.25 0.3125 0.375 0.4375 0.5 0.5625 0.625 0.75 0.875 1 5.486 6.350 7.938 9.525 11.113 12.700 14.288 15.875 19.050 22.225 25.400 32 32 32 32 28 28 24 24 20 20 20 0.031 0.031 0. ...
23 Φεβ 2024 · The table includes various diameters and threads per inch for the UNC series, providing essential information such as major diameters, tap drill sizes, and pitches in both inches and millimeters. This chart is a valuable resource for engineers, machinists, and anyone involved in the design and assembly of mechanical components that utilize ...
millimeter pitch and finer, and sizes over 1.510" diameter with 10 or more threads per inch or 2.5 millimeter pitch and finer, are made to general dimensions, Table 303, United States Cutting Tool Institute (USCTI) standards.
These are general tap recommendations to produce the Class of Thread indicated in average materials when used with reasonable care. However, if the tap specified does not give a satisfactory gauge fit in the work, please consult the factory.
Standard Tap Size Chart | Threading Tap Sizes | Regal Cutting Tools Subject: Standard tap drill chart shows the nominal and metric tap sizes for machine screws up to one-inch diameter. Learn more about standard tap dimensions.
Tap Chart - UNC/UNF Threads Tap size NF/NC UNF/UNC Threads per inch Basic major dia (inches) Basic effective dia (inches) Basic minor dia of ext. threads (inches) Basic minor dia of int. threads (inches) Drill size 0-80 UNF 80 .0600 .0519 .0447 .0465 3/64 1-64 UNC 64 .0730 .0629 .0538 .0561 #54
The tap size chart provides a list of standard size taps, specifying the diameter and thread spacing, for fractional, metric, and screw sizes. The decimal equivalents of the diameters are shown in both English and Metric units.
