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About product and suppliers:
        Alibaba.com offers 23,387 4mm screw products. About 4% of these are screws, 1% are air-compressors. 

A wide variety of 4mm screw options are available to you, such as free samples, paid samples. 

There are 23,387 4mm screw suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 4mm screw respectively. 

mm screw products are most popular in Domestic Market, North America, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 8,346 with ISO9001, 1,889 with Other, and 963 with ISO14001 certification.