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About product and suppliers:
        Alibaba.com offers 132,017 steel coupling products. About 29% of these are pipe fittings, 5% are shaft couplings, and 1% are other general mechanical components. 

A wide variety of steel coupling options are available to you, such as coupling, nipple, and union. You can also choose from stainless steel, carbon steel, and iron. As well as from reducing, equal. And whether steel coupling is square, or hexagon. 

There are 131,138 steel coupling suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 99%, 1%, and 1% of steel coupling respectively. 

Steel coupling products are most popular in North America, South America, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 47,855 with ISO9001, 17,827 with Other, and 6,921 with ISO14001 certification.