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About product and suppliers:
        Alibaba.com offers 548 duplex stud products. About 48% of these are bolts. 

A wide variety of duplex stud options are available to you, such as steel, metal. You can also choose from free samples, paid samples. 

There are 548 duplex stud suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of duplex stud respectively. 

Duplex stud products are most popular in Northern Europe, Southern Europe, and Central America. 

You can ensure product safety by selecting from certified suppliers, including 382 with ISO9001, 341 with ISO14001, and 337 with Other certification.