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29 wrz 2024 · #4-40 screw diameter and thread count. The #4-40 screw has a thread size of 40 TPI (Threads Per Inch) and is considered a coarse (standard) thread. The #4-40 screw is available in a range of lengths, from 3/16" to 2". The #4-40 screw has a head diameter of 0.219" and a head height of 0.080".
#4 - 40 UNC : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more
20 wrz 2024 · For example, a 1/4-inch screw size would convert to approximately 6.35 mm in metric. Similarly, a 3/8-inch screw is equivalent to approximately 9.525 mm, and a 1/2-inch screw converts to roughly 12.7 mm.
Metric Screws and Their Approximate Imperial Equivalents. Example how to read the table: M5 x 80 equals approximately to #10 x 2 1/2. Refer to this chart to find the appropriate head size and corresponding wrench for hex bolts, lag bolts & square bolts in inches.
Metric Imperial Screw Conversion Chart. Please use this table to match the metric size to the imperial screw size. Please remember that the conversion is not exact, but this is generally not a problem and the margins of error are generally considerably less than your own measurements.
Imperial screw sizes often consist of two parts: a number followed by a fraction. The number represents the major diameter or thread size of the screw, while the fraction indicates the length or shank size. Commonly used imperial screw sizes include #2-56, #4-40, and #10-32.
Standard Screw Thread Chart. The values listed in the chart above are the recommended values for a class 2 thread fit. The clearance drill sizes listed are the most commonly used sizes.
