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About product and suppliers:
        Alibaba.com offers 414 hex 18mm products. About 20% of these are bolts, 12% are screws, and 4% are nuts. 

A wide variety of hex 18mm options are available to you, such as free samples, paid samples. 

There are 414 hex 18mm suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of hex 18mm respectively. 

Hex 18mm products are most popular in North America, Western Europe, and Eastern Asia. 

You can ensure product safety by selecting from certified suppliers, including 176 with ISO9001, 25 with Other, and 20 with ISO/TS16949 certification.
        
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