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About product and suppliers:
        Alibaba.com offers 133,778 steel coupling products. About 18% of these are pipe fittings, 7% are shaft couplings, and 1% are hydraulic parts. 

A wide variety of steel coupling options are available to you, such as square. You can also choose from equal, round. As well as from female, welding. And whether steel coupling is coupling, union, or nipple. 

There are 132,934 steel coupling suppliers, mainly located in Asia. The top supplying countries or regions are United States, China, and India, which supply 1%, 98%, and 1% of steel coupling respectively. 

Steel coupling products are most popular in United States, Australia, and United Kingdom.