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About product and suppliers:
        Alibaba.com offers 543,674 screw machine products. About 2% of these are thread rolling machines, 1% are capping machines, and 1% are other metal & metallurgy machinery. 

A wide variety of screw machine options are available to you, such as free samples, paid samples. 

There are 541,991 screw machine suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 99%, 1%, and 1% of screw machine respectively. 

Screw machine products are most popular in Domestic Market, Southeast Asia, and Africa. 

You can ensure product safety by selecting from certified suppliers, including 143,209 with ISO9001, 83,758 with Other, and 16,465 with ISO14001 certification.