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About product and suppliers:
        Alibaba.com offers 2,149 u bolt machine products. About 5% of these are thread rolling machines, 1% are other metal & metallurgy machinery, and 1% are multi-function packaging machines. 

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

There are 2,149 u bolt machine suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of u bolt machine respectively. 

U bolt machine products are most popular in North America, Mid East, and South America. 

You can ensure product safety by selecting from certified suppliers, including 1,030 with ISO9001, 599 with Other, and 66 with ISO14001 certification.