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About product and suppliers:
        Alibaba.com offers 1,363 screws uni products. About 15% of these are screws. 

A wide variety of screws uni options are available to you, such as free samples. 

There are 1,363 screws uni suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of screws uni respectively. 

Screws uni products are most popular in South America, Mid East, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 920 with ISO9001, 41 with Other, and 35 with ISO14001 certification.