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About product and suppliers:
        Alibaba.com offers 2,759,422 screw products. About 4% of these are nails, 2% are screws, and 1% are drywall screws. 

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

There are 2,759,233 screw suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and India, which supply 99%, 1%, and 1% of screw respectively. 

Screw products are most popular in Domestic Market, North America, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 966,997 with ISO9001, 383,532 with Other, and 116,288 with ISO14001 certification.