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About product and suppliers:
        Alibaba.com offers 33,200 black machine screws products. About 27% of these are screws, 6% are bolts. 

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

There are 33,193 black machine screws suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Japan, which supply 97%, 2%, and 1% of black machine screws respectively. 

Black machine screws products are most popular in North America, Domestic Market, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 16,356 with ISO9001, 6,211 with Other, and 2,346 with ISO14001 certification.