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Industry Information
Industry Information
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At present, most of the screws are produced in Yongnian County, Hebei Province. Every county in the country has Yongnian who sells standard parts. Standard screws include bolts, screws, studs, nuts, machine screws, self-tapping screws, washers. Ten...
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In fact, the standard is that there are no screws and nuts. Screws are commonly known as "screws" with external threads. The shape of the nut is usually hexagonal, and the inner hole is internally threaded to match the bolt and tighten the relevant...
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