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About product and suppliers:
        Alibaba.com offers 1,958 coupling hex steel products. About 7% of these are screws, 4% are machining, and 1% are other fasteners. 

A wide variety of coupling hex steel options are available to you, such as stainless steel, iron, and steel. You can also choose from en, din, and jis. As well as from free samples, paid samples. 

There are 1,958 coupling hex steel suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of coupling hex steel respectively. 

Coupling hex steel products are most popular in North America, Domestic Market, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 1,038 with ISO9001, 172 with ISO14001, and 133 with Other certification.