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The Unified Thread Standard (UTS) is a screw thread form and series used in the US and Canada. It has a 60° profile, a major diameter, a minor diameter, and a pitch, and is designated by a number and a threads per inch.
BSC or BSCy is a British Imperial screw thread standard for bicycles and motorcycles. It has a 60 degrees angle and 26 threads per inch for sizes 4 inch and larger.
An M8 screw is a type of general-purpose screw thread with a nominal outer diameter of 8 millimetres. Learn about the design, dimensions, tolerances and preferred sizes of ISO metric screw threads from this Wikipedia article.
BA screw threads are a set of small screw threads with a geometric sequence of pitches and diameters. They are used for miniature instruments and modelling, and have a thread angle of 47.5° and a depth of 0.6 times the pitch.
Within a given manufacturer's spectrum, a higher "aught count" indicates a finer thread: this may be given as a single digit followed by a forward slash and a zero— for example, 3/0 indicates a three-aught thread or a thread size "000", but this number only has significance when compared to other threads produced by the same manufacturer: one ...
Learn about the history and features of the Whitworth thread, the world's first national screw thread standard devised by Joseph Whitworth in 1841. See the list of thread sizes and the table of historical thread size conversions.