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A metric screw and bolt thread chart can be found at FastenerMart.com. Unlike inch-sized screws and bolts, metric screw sizes are preceded by an "M," and the dimensions are listed in metric units. More »

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Metric thread charts contain information regarding the internal and external diameter of the bolt or nut, the thread's spacing and the thread's minimum and maximum pitch. It also contains the ISO metric thread profile. More »

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Diameter, pitch and length in millimeters define the size of a metric screw. Metric screws have pitches of coarse, fine or extra fine. Carriage and stove screws are coarse threaded. Machine screws are either coarse threa... More »

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Headings on a thread pitch chart include thread class, the fit when a screw is being placed in an also-threaded part; major and minor diameter; and pitch diameter, the point where the width of thread and space between th... More »

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A screw is a fastener that has a ridge or thread encircling the entire length of the device, while a bolt has a smooth shaft and a threaded end. Screws have heads with a depression indicating the type of driver necessary... More »

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Bolt Depot lists nine standard machine screw sizes, the smallest of which is seven-sixty-fourths of an inch with a thread count of 40, while the largest is three-eighths of an inch with a thread count of 16. Some machine... More »

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A Heli-Coil tap chart is a chart indicating the appropriate tapping tools and procedures for cutting threads to receive a particular size of Heli-Coil screw thread insert. A tap is a tool used to cut threads into a hole ... More »

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