Fasteners threaded standard

Standard threaded fasteners :: originally were only a national standard threaded fasteners, along with the growing development of China's market economy, foreign kinds of products machinery continued presence in China's market, so domestic kinds of products have also become complicated, cross country, and a variety of manufacturing standards have also become more, such as the Japanese standard, British standard, American standard, German standard, which is the most prominent of which is the British standard (also known as inch) and American Standard (also known as the US-made), and the most obvious is in these kinds of standard fasteners, British standard and American standard fasteners range of products accounted for almost China's one-third of the market, in which many standard domestic fasteners only accounted for a little more than one-third of China's fastener market. So here we to explain the three kinds biggest difference between: the threads of the fastener, for example, illustrate: domestic Metric fasteners thread pitch to express, and the imperial system with the United States is every inch the number of teeth number expressed in metric thread 60 degree equilateral tooth type, and inch thread is 55 degrees isosceles tooth type, JIC 60 degrees. Metric threads metric unit system thread using imperial units in the United States and Britain.