The recommended tap drill size is equal to the outside diameter minus the pitch. Metric tap sizes are designated by a capital M, the outside diameter in millimeters, and by the pitch in millimeters; such as M22 x 1.5. To find’ the recommended tap drill size, subtract 1.5 from 22, to get 20.5, which is the recommended tap drill size.

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. Fractional sizes are listed in inches, while metric sizes are listed in millimeters following the letter "M".

Distributor of standard & custom tapping screws including self-tapping screws. Types of screws include metric screws, flat head screws, hex head screws, oval head screws, pan head screws, gimlet point.

M10 Metric Fine Bolts

Tap & Clearance drill sizes tap drill Clearance Drill Screw Size Major Diameter Plastics Threads Per Inch Minor Aluminum, Brass, Diameter 75% Thread for & 50% Thread for Steel, Stainless, & Iron Close Fit Free Fit Drill size dec. eq. Drill Size Dec. Eq. Drill Size Dec. Eq. Drill Size Dec. Eq.

This table is the chart for publication of information of metric machine screws, along with tap and clearance drill information. If all else fails, you may want to use our Drill Size Conversion Table or our Tap Drill Size Calculator.The information available from our sources is usually sufficient for all computer related drill or screw requirements world wide.

This table is the chart for publication of information of number machine screws, along with tap and clearance drill information. If all else fails,

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If a screw will drill its own hole it is a Self-Drilling Screw. Other screws that might be considered to be in the Self-Tapping Screw category are: Thread-Cutting Screws (TCS) – These are screws that can be used to cut threads in a pre-drilled hole. There are many types of TCS and each has a different thread-form to accomplish that goal.

US Sheet Metal Screw Diameters. Print this page . Size Thread Diameter; Decimal Nearest Fractional #4.112"